{"title":"Experiments","description":"","products":[{"product_id":"magnetic-levitation-experiment-kit","title":"Magnetic Levitation Experiment  Kit","description":"\u003cp\u003e\u003cem\u003e\u003cstrong\u003eCan magnets really float in mid-air? Explore magnetic repulsion and stability through this hands-on levitation experiment.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat you will learn ?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMagnetic Behaviour\u003c\/p\u003e\n\u003cp\u003eStability and Equilibrium\u003c\/p\u003e\n\u003cp\u003eDiamagnetism Concepts\u003c\/p\u003e\n\u003cp\u003ePractical engineering Design\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIncluded In the Kit\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRing Magnets\u003c\/p\u003e\n\u003cp\u003eRolling Transparent Support\u003c\/p\u003e\n\u003cp\u003eCello-tape\u003c\/p\u003e\n\u003cp\u003eScissor\u003c\/p\u003e\n\u003cp\u003eInstruction sheet\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow To Perform The Experiment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta content=\"text\/html; charset=utf-8\" http-equiv=\"content-type\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan id=\"docs-internal-guid-6b178417-7fff-55a4-0891-aa6bd1dedf78\"\u003eMake a tube shape out of the transparent support  and tape it. The diameter should be slightly larger than the round magnets.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eStack Magnets with identical poles facing.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eObserve stable levitation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eExperiment with more magnets. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eScientific Principle\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLike magnetic poles repel each other. The guide tube constrains lateral motion, allowing stable vertical levitation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVideo Demonstration\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFAQs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eQ: Why does the top magnet flip without the guide tube? Can you levitate it without the support?\u003c\/p\u003e\n\u003cp\u003eQ: Why is the tube necessary?\u003c\/p\u003e\n\u003cp\u003eQ: Can stronger magnets improve levitation?\u003c\/p\u003e","brand":"Geometers","offers":[{"title":"Default Title","offer_id":45820348825736,"sku":null,"price":299.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/3891\/4952\/files\/IMG-0874.heic?v=1778742191"},{"product_id":"seeing-magnetic-fields-in-2d-reconstructing-a-3d-world","title":"Seeing Magnetic Fields in 2D — Reconstructing a 3D World","description":"\u003cp\u003e\u003cmeta content=\"text\/html; charset=utf-8\" http-equiv=\"content-type\"\u003eMagnetic field lines drawn by iron filings look like hidden patterns emerging from nowhere. But these patterns are only 2-D slices of a much larger 3-D magnetic structure. By changing the orientation of magnets and capturing multiple field patterns, we can begin reconstructing the invisible magnetic world — similar to how CT scans reconstruct the inside of the human body.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1aswwnp\" data-start=\"872\" data-end=\"890\"\u003eWhat You Observe\u003c\/h1\u003e\n\u003cp data-start=\"892\" data-end=\"1052\"\u003eWhen iron filings are sprinkled over a sheet placed above a magnet, the filings align themselves along the magnetic field direction, revealing intricate curves.\u003c\/p\u003e\n\u003cp data-start=\"1054\" data-end=\"1123\"\u003eDifferent magnet arrangements create dramatically different patterns:\u003c\/p\u003e\n\u003cul data-start=\"1125\" data-end=\"1238\"\u003e\n\u003cli data-section-id=\"3ejzxz\" data-start=\"1125\" data-end=\"1144\"\u003eSingle bar magnet\u003c\/li\u003e\n\u003cli data-section-id=\"drqp8m\" data-start=\"1145\" data-end=\"1169\"\u003eTwo attracting magnets\u003c\/li\u003e\n\u003cli data-section-id=\"ln731d\" data-start=\"1170\" data-end=\"1193\"\u003eTwo repelling magnets\u003c\/li\u003e\n\u003cli data-section-id=\"9rbrul\" data-start=\"1194\" data-end=\"1208\"\u003eRing magnets\u003c\/li\u003e\n\u003cli data-section-id=\"1o6852u\" data-start=\"1209\" data-end=\"1238\"\u003eComplex magnet combinations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1240\" data-end=\"1299\"\u003eEach image is only a \u003cem data-start=\"1261\" data-end=\"1268\"\u003eslice\u003c\/em\u003e of the full 3-D magnetic field.\u003c\/p\u003e\n\u003ch1 data-section-id=\"rfmplj\" data-start=\"1306\" data-end=\"1328\"\u003eCore Scientific Idea\u003c\/h1\u003e\n\u003cp data-start=\"1330\" data-end=\"1457\"\u003eThe patterns seen on the sheet are not the full magnetic field. They are 2-D intersections of a 3-D field structure with a plane.\u003c\/p\u003e\n\u003cp data-start=\"1459\" data-end=\"1521\"\u003eThe magnetic field exists in all directions around the magnet:\u003c\/p\u003e\n\u003cp data-start=\"1562\" data-end=\"1625\"\u003eThe iron filings reveal the field behaviour only on one surface.\u003c\/p\u003e\n\u003cp data-start=\"1627\" data-end=\"1799\"\u003eIf we rotate the magnet or observe from different planes, we obtain additional slices of information. Combining many such slices allows us to infer the hidden 3-D structure.\u003c\/p\u003e\n\u003ch1 data-section-id=\"kz7vsg\" data-start=\"1806\" data-end=\"1830\"\u003eConnection to CT Scans\u003c\/h1\u003e\n\u003cp data-start=\"1832\" data-end=\"1884\"\u003eThis is conceptually similar to how a CT scan works.\u003c\/p\u003e\n\u003cp data-start=\"1886\" data-end=\"2055\"\u003eA CT scanner does not directly see a complete 3-D organ. Instead, it captures many 2-D projections from different angles and reconstructs the 3-D structure computationally.\u003c\/p\u003e\n\u003cp data-start=\"2295\" data-end=\"2349\"\u003eThis makes the experiment a beautiful introduction to:\u003c\/p\u003e\n\u003cul data-start=\"2351\" data-end=\"2453\"\u003e\n\u003cli data-section-id=\"14wtsj1\" data-start=\"2351\" data-end=\"2369\"\u003eElectromagnetism\u003c\/li\u003e\n\u003cli data-section-id=\"1ihwu78\" data-start=\"2370\" data-end=\"2382\"\u003eTomography\u003c\/li\u003e\n\u003cli data-section-id=\"k79hs0\" data-start=\"2383\" data-end=\"2401\"\u003eInverse problems\u003c\/li\u003e\n\u003cli data-section-id=\"1tyh3ux\" data-start=\"2402\" data-end=\"2422\"\u003eScientific imaging\u003c\/li\u003e\n\u003cli data-section-id=\"2w6tdu\" data-start=\"2423\" data-end=\"2453\"\u003eComputational reconstruction\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1 data-section-id=\"1segny3\" data-start=\"2460\" data-end=\"2496\"\u003eWhy This Experiment Is Interesting\u003c\/h1\u003e\n\u003cp data-start=\"2498\" data-end=\"2606\"\u003eMost people think magnetic field lines are “the field itself.” But this experiment reveals something deeper:\u003c\/p\u003e\n\u003cul data-start=\"2608\" data-end=\"2800\"\u003e\n\u003cli data-section-id=\"341gav\" data-start=\"2608\" data-end=\"2642\"\u003eObservations depend on viewpoint\u003c\/li\u003e\n\u003cli data-section-id=\"fzvgcf\" data-start=\"2643\" data-end=\"2678\"\u003e2-D data can encode 3-D information\u003c\/li\u003e\n\u003cli data-section-id=\"2tb0um\" data-start=\"2679\" data-end=\"2734\"\u003eComplex systems can be reconstructed from projections\u003c\/li\u003e\n\u003cli data-section-id=\"6v9nni\" data-start=\"2735\" data-end=\"2800\"\u003eScientific instruments often infer hidden structures indirectly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1 data-section-id=\"tg2eal\" data-start=\"2900\" data-end=\"2919\"\u003eExploration Ideas\u003c\/h1\u003e\n\u003ch3 data-section-id=\"oeomay\" data-start=\"2940\" data-end=\"2955\"\u003eBasic Level\u003c\/h3\u003e\n\u003cul data-start=\"2956\" data-end=\"3051\"\u003e\n\u003cli data-section-id=\"d9ae3k\" data-start=\"2956\" data-end=\"2997\"\u003eCompare patterns from different magnets\u003c\/li\u003e\n\u003cli data-section-id=\"1w76k7z\" data-start=\"2998\" data-end=\"3031\"\u003eObserve attraction vs repulsion\u003c\/li\u003e\n\u003cli data-section-id=\"1oa1qqk\" data-start=\"3032\" data-end=\"3051\"\u003eIdentify symmetry\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"8vnnj5\" data-start=\"3053\" data-end=\"3075\"\u003eIntermediate Level\u003c\/h3\u003e\n\u003cul data-start=\"3076\" data-end=\"3197\"\u003e\n\u003cli data-section-id=\"1k959tz\" data-start=\"3076\" data-end=\"3114\"\u003eRotate the magnet and capture images\u003c\/li\u003e\n\u003cli data-section-id=\"hk9a8q\" data-start=\"3115\" data-end=\"3159\"\u003eCompare slices from different orientations\u003c\/li\u003e\n\u003cli data-section-id=\"69z0y2\" data-start=\"3160\" data-end=\"3197\"\u003ePredict unseen regions of the field\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"y8xo9a\" data-start=\"3199\" data-end=\"3217\"\u003eAdvanced Level\u003c\/h3\u003e\n\u003cul data-start=\"3218\" data-end=\"3349\"\u003e\n\u003cli data-section-id=\"1lhzkc5\" data-start=\"3218\" data-end=\"3261\"\u003eReconstruct approximate 3-D field geometry\u003c\/li\u003e\n\u003cli data-section-id=\"47tqtf\" data-start=\"3262\" data-end=\"3304\"\u003eUse image processing to analyse patterns\u003c\/li\u003e\n\u003cli data-section-id=\"5te11s\" data-start=\"3305\" data-end=\"3349\"\u003eExplore analogy with tomography algorithms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1240\" data-end=\"1299\"\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Geometers","offers":[{"title":"Default Title","offer_id":45850822606984,"sku":null,"price":0.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/3891\/4952\/files\/IMG_0899.jpg?v=1779165441"},{"product_id":"make-your-way-through-the-curvy-path-learn-magnetic-force-through-motion","title":"Make Your Way Through the Curvy Path — Learn Magnetic Force Through Motion","description":"\u003ch1 data-start=\"121\" data-end=\"161\"\u003e\u003cstrong\u003eCan you drive a car without touching it?\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp data-start=\"163\" data-end=\"462\"\u003eUsing only invisible magnetic forces from your hands, guide a tiny car through a winding path without crossing the boundaries. What begins as a fun challenge slowly turns into something deeper: controlling motion using forces alone — the same fundamental idea behind spacecraft manoeuvring in space.\u003c\/p\u003e\n\u003ch1 data-section-id=\"dfiba5\" data-start=\"469\" data-end=\"483\"\u003eWhat Happens\u003c\/h1\u003e\n\u003cp data-start=\"485\" data-end=\"539\"\u003eA small toy car is fitted with tiny neodymium magnets:\u003c\/p\u003e\n\u003cul data-start=\"541\" data-end=\"596\"\u003e\n\u003cli data-section-id=\"1xr63c1\" data-start=\"541\" data-end=\"559\"\u003eOne at the front\u003c\/li\u003e\n\u003cli data-section-id=\"lheazv\" data-start=\"560\" data-end=\"577\"\u003eOne at the back\u003c\/li\u003e\n\u003cli data-section-id=\"8lykhl\" data-start=\"578\" data-end=\"596\"\u003eOne on each side\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"598\" data-end=\"693\"\u003eMagnets are also attached to both palms in such a way that the interaction is always repulsive.\u003c\/p\u003e\n\u003cp data-start=\"695\" data-end=\"778\"\u003eAs your hands move near the car, magnetic push forces act like invisible thrusters:\u003c\/p\u003e\n\u003cul data-start=\"780\" data-end=\"892\"\u003e\n\u003cli data-section-id=\"79ggod\" data-start=\"780\" data-end=\"794\"\u003ePush forward\u003c\/li\u003e\n\u003cli data-section-id=\"1qeljvh\" data-start=\"795\" data-end=\"810\"\u003ePush backward\u003c\/li\u003e\n\u003cli data-section-id=\"1etzf3l\" data-start=\"811\" data-end=\"826\"\u003ePush sideways\u003c\/li\u003e\n\u003cli data-section-id=\"v5wyn3\" data-start=\"827\" data-end=\"859\"\u003eRotate the car unintentionally\u003c\/li\u003e\n\u003cli data-section-id=\"4izte3\" data-start=\"860\" data-end=\"892\"\u003eCorrect direction continuously\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"894\" data-end=\"1001\"\u003eThe goal is to navigate through a narrow curving path from start to finish without touching the boundaries.\u003c\/p\u003e\n\u003ch1 data-section-id=\"6i6ptx\" data-start=\"1008\" data-end=\"1035\"\u003eWhat Makes It Fascinating\u003c\/h1\u003e\n\u003cp data-start=\"1037\" data-end=\"1070\"\u003eYou never directly touch the car.\u003c\/p\u003e\n\u003cp data-start=\"1072\" data-end=\"1132\"\u003eInstead, you continuously control it using invisible forces.\u003c\/p\u003e\n\u003cp data-start=\"1134\" data-end=\"1332\"\u003eThe experience feels surprisingly real — almost like piloting a hover vehicle or spacecraft. Small hand movements create motion, but controlling that motion precisely becomes difficult very quickly.\u003c\/p\u003e\n\u003cp data-start=\"1334\" data-end=\"1384\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cblockquote data-start=\"1386\" data-end=\"1445\"\u003e\n\u003cp data-start=\"1388\" data-end=\"1445\"\u003eProducing motion is easy.\u003cbr data-start=\"1413\" data-end=\"1416\"\u003eControlling motion is hard.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003cp data-start=\"1447\" data-end=\"1526\"\u003eThat realisation is at the heart of mechanics, robotics, and space engineering.\u003c\/p\u003e\n\u003cp data-start=\"1770\" data-end=\"1904\"\u003eThe car’s motion becomes a continuous problem of balance and correction.\u003c\/p\u003e\n\u003cp data-start=\"1906\" data-end=\"1968\"\u003eEven a small sideways force can push the car out of the track.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1bfv1e1\" data-start=\"1975\" data-end=\"2012\"\u003eControl Is Difficult\u003c\/h1\u003e\n\u003cp data-start=\"2014\" data-end=\"2048\"\u003eThis experiment naturally teaches:\u003c\/p\u003e\n\u003cul data-start=\"2050\" data-end=\"2176\"\u003e\n\u003cli data-section-id=\"10vov28\" data-start=\"2050\" data-end=\"2068\"\u003eForce and motion\u003c\/li\u003e\n\u003cli data-section-id=\"wcxzon\" data-start=\"2069\" data-end=\"2090\"\u003eDirectional control\u003c\/li\u003e\n\u003cli data-section-id=\"lpyvfx\" data-start=\"2091\" data-end=\"2102\"\u003eStability\u003c\/li\u003e\n\u003cli data-section-id=\"htjs68\" data-start=\"2103\" data-end=\"2113\"\u003eMomentum\u003c\/li\u003e\n\u003cli data-section-id=\"15dln1s\" data-start=\"2114\" data-end=\"2130\"\u003eOver-correction\u003c\/li\u003e\n\u003cli data-section-id=\"mdqiuj\" data-start=\"2131\" data-end=\"2151\"\u003ePrecision steering\u003c\/li\u003e\n\u003cli data-section-id=\"w1iol6\" data-start=\"2152\" data-end=\"2176\"\u003eFeedback-based control\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2178\" data-end=\"2267\"\u003eYou will intuitively experience why controlling vehicles is a real engineering challenge.\u003c\/p\u003e\n\u003ch1 data-section-id=\"30m41a\" data-start=\"2274\" data-end=\"2315\"\u003eConnection to Spacecraft and Satellites\u003c\/h1\u003e\n\u003cp data-start=\"2317\" data-end=\"2369\"\u003eSpacecraft in orbit cannot steer like cars on roads.\u003c\/p\u003e\n\u003cp data-start=\"2371\" data-end=\"2441\"\u003eInstead, they use tiny bursts of thrust from engines to change motion:\u003c\/p\u003e\n\u003cul data-start=\"2443\" data-end=\"2522\"\u003e\n\u003cli data-section-id=\"cvvzj6\" data-start=\"2443\" data-end=\"2457\"\u003eMove forward\u003c\/li\u003e\n\u003cli data-section-id=\"4fwinx\" data-start=\"2458\" data-end=\"2469\"\u003eSlow down\u003c\/li\u003e\n\u003cli data-section-id=\"6scdox\" data-start=\"2470\" data-end=\"2478\"\u003eRotate\u003c\/li\u003e\n\u003cli data-section-id=\"2m8wmw\" data-start=\"2479\" data-end=\"2499\"\u003eChange orientation\u003c\/li\u003e\n\u003cli data-section-id=\"1v9325w\" data-start=\"2500\" data-end=\"2522\"\u003eCorrect orbital path\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2524\" data-end=\"2566\"\u003eThis experiment mimics the same principle.\u003c\/p\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"2568\" data-end=\"2804\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"2568\" data-end=\"2595\"\u003e\n\u003ctr data-start=\"2568\" data-end=\"2595\"\u003e\n\u003cth data-start=\"2568\" data-end=\"2581\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eExperiment\u003c\/th\u003e\n\u003cth data-start=\"2581\" data-end=\"2595\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eSpacecraft\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"2606\" data-end=\"2804\"\u003e\n\u003ctr data-start=\"2606\" data-end=\"2639\"\u003e\n\u003ctd data-start=\"2606\" data-end=\"2622\" data-col-size=\"sm\"\u003eMagnetic push\u003c\/td\u003e\n\u003ctd data-start=\"2622\" data-end=\"2639\" data-col-size=\"sm\"\u003eRocket thrust\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2640\" data-end=\"2678\"\u003e\n\u003ctd data-start=\"2640\" data-end=\"2659\" data-col-size=\"sm\"\u003eHand corrections\u003c\/td\u003e\n\u003ctd data-start=\"2659\" data-end=\"2678\" data-col-size=\"sm\"\u003eGuidance system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2679\" data-end=\"2715\"\u003e\n\u003ctd data-start=\"2679\" data-end=\"2693\" data-col-size=\"sm\"\u003eCurved path\u003c\/td\u003e\n\u003ctd data-start=\"2693\" data-end=\"2715\" data-col-size=\"sm\"\u003eOrbital trajectory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2716\" data-end=\"2759\"\u003e\n\u003ctd data-start=\"2716\" data-end=\"2736\" data-col-size=\"sm\"\u003eCar drifting away\u003c\/td\u003e\n\u003ctd data-start=\"2736\" data-end=\"2759\" data-col-size=\"sm\"\u003eOrbital instability\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2760\" data-end=\"2804\"\u003e\n\u003ctd data-start=\"2760\" data-end=\"2785\" data-col-size=\"sm\"\u003eContinuous adjustments\u003c\/td\u003e\n\u003ctd data-start=\"2785\" data-end=\"2804\" data-col-size=\"sm\"\u003eStation keeping\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-start=\"2178\" data-end=\"2267\"\u003eThe magnetic push acting on the car behaves like a miniature thrust system.\u003c\/p\u003e\n\u003cp data-start=\"2178\" data-end=\"2267\"\u003e \u003c\/p\u003e","brand":"Geometers","offers":[{"title":"Default Title","offer_id":45860796727432,"sku":null,"price":0.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/3891\/4952\/files\/1_17767d1f-1f77-4bd1-a3c4-be7307f9e593.jpg?v=1779433474"},{"product_id":"hanging-compass-discovering-direction-using-a-freely-suspended-magnet","title":"Hanging Compass — Discovering Direction Using a Freely Suspended Magnet","description":"\u003ch1 data-start=\"118\" data-end=\"168\"\u003e\u003cstrong\u003eWhat happens if you hang a magnet freely in space?\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp data-start=\"170\" data-end=\"373\"\u003eNo matter how you rotate it initially, it slowly turns and settles into a preferred direction. This simple observation led humanity to one of the most revolutionary inventions ever created — the compass.\u003c\/p\u003e\n\u003cp data-start=\"375\" data-end=\"402\"\u003eBut the deeper question is:\u003c\/p\u003e\n\u003cblockquote data-start=\"404\" data-end=\"446\"\u003e\n\u003cp data-start=\"406\" data-end=\"446\"\u003eHow does a magnet “know” where to point?\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003ch1 data-section-id=\"d5fv35\" data-start=\"453\" data-end=\"484\"\u003eWhat This Experiment Explores\u003c\/h1\u003e\n\u003cp data-start=\"486\" data-end=\"561\"\u003eThis experiment transforms an ordinary magnet into a scientific instrument.\u003c\/p\u003e\n\u003cp data-start=\"563\" data-end=\"584\"\u003eInvestigate:\u003c\/p\u003e\n\u003cul data-start=\"586\" data-end=\"831\"\u003e\n\u003cli data-section-id=\"e5fz64\" data-start=\"586\" data-end=\"633\"\u003eHow magnets align with Earth’s magnetic field\u003c\/li\u003e\n\u003cli data-section-id=\"1r4fjuu\" data-start=\"634\" data-end=\"697\"\u003eHow to identify the hidden magnetic axis of irregular magnets\u003c\/li\u003e\n\u003cli data-section-id=\"1etxfy3\" data-start=\"698\" data-end=\"728\"\u003eWhy suspended magnets rotate\u003c\/li\u003e\n\u003cli data-section-id=\"16ae7er\" data-start=\"729\" data-end=\"767\"\u003eWhy some orientations show no motion\u003c\/li\u003e\n\u003cli data-section-id=\"139r5th\" data-start=\"768\" data-end=\"793\"\u003eWhat magnetic dip means\u003c\/li\u003e\n\u003cli data-section-id=\"1pyjm6r\" data-start=\"794\" data-end=\"831\"\u003eHow a true 3D compass could be made\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"833\" data-end=\"954\"\u003eThe experiment begins simply, but gradually opens the door to Earth’s magnetism, orientation in space, and vector fields.\u003c\/p\u003e\n\u003ch1 data-section-id=\"q48eb4\" data-start=\"961\" data-end=\"997\"\u003eFinding the Magnetic Axis\u003c\/h1\u003e\n\u003cp data-start=\"999\" data-end=\"1066\"\u003eEvery magnet has a magnetic axis joining its north and south poles.\u003c\/p\u003e\n\u003cp data-start=\"1068\" data-end=\"1107\"\u003eFor a bar magnet, this axis is obvious.\u003c\/p\u003e\n\u003cp data-start=\"1109\" data-end=\"1204\"\u003eBut for irregular magnets, ring magnets, curved magnets, or unusual shapes, the axis is hidden.\u003c\/p\u003e\n\u003cp data-start=\"1206\" data-end=\"1217\"\u003eTo find it:\u003c\/p\u003e\n\u003col data-start=\"1219\" data-end=\"1412\"\u003e\n\u003cli data-section-id=\"1o0kpwk\" data-start=\"1219\" data-end=\"1268\"\u003ePlace a small magnetic compass near the magnet\u003c\/li\u003e\n\u003cli data-section-id=\"1his6g5\" data-start=\"1269\" data-end=\"1305\"\u003eRotate and move the magnet slowly\u003c\/li\u003e\n\u003cli data-section-id=\"j67c2i\" data-start=\"1306\" data-end=\"1348\"\u003eObserve how the compass needle responds\u003c\/li\u003e\n\u003cli data-section-id=\"e8vluq\" data-start=\"1349\" data-end=\"1412\"\u003eIdentify regions where magnetic field lines emerge and enter\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-start=\"1414\" data-end=\"1477\"\u003eThe line joining these effective poles gives the magnetic axis.\u003c\/p\u003e\n\u003cp data-start=\"1479\" data-end=\"1542\"\u003eThe magnetic field around the magnet guides the compass needle.\u003c\/p\u003e\n\u003ch1 data-section-id=\"19u18rj\" data-start=\"1549\" data-end=\"1578\"\u003eStep 2 — Hanging the Magnet\u003c\/h1\u003e\n\u003cp data-start=\"1580\" data-end=\"1619\"\u003eSuspend the magnet freely using thread.\u003c\/p\u003e\n\u003cp data-start=\"1621\" data-end=\"1654\"\u003eNow something remarkable happens:\u003c\/p\u003e\n\u003cp data-start=\"1656\" data-end=\"1721\"\u003eThe magnet rotates and aligns itself with Earth’s magnetic field.\u003c\/p\u003e\n\u003cp data-start=\"1723\" data-end=\"1803\"\u003eThe magnetic torque tends to align the magnetic axis with the surrounding field.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1wt63m9\" data-start=\"1988\" data-end=\"2008\"\u003eA Deep Observation\u003c\/h1\u003e\n\u003cp data-start=\"2010\" data-end=\"2089\"\u003eIf the magnetic axis is suspended vertically, the magnet may not rotate at all.\u003c\/p\u003e\n\u003cp data-start=\"2091\" data-end=\"2095\"\u003eWhy?\u003c\/p\u003e\n\u003cp data-start=\"2097\" data-end=\"2213\"\u003eBecause the magnetic axis already lies along the axis of suspension, so no turning torque acts about that direction.\u003c\/p\u003e\n\u003cp data-start=\"2215\" data-end=\"2250\"\u003eThis reveals something fundamental:\u003c\/p\u003e\n\u003cblockquote data-start=\"2252\" data-end=\"2342\"\u003e\n\u003cp data-start=\"2254\" data-end=\"2342\"\u003eRotation depends not only on force, but also on geometry and allowed degrees of freedom.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003cp data-start=\"2344\" data-end=\"2416\"\u003eThat is a profound physical idea hidden inside a very simple experiment.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1trdpj6\" data-start=\"2423\" data-end=\"2471\"\u003eMagnetic Dip — Earth’s Field Is Not Horizontal\u003c\/h1\u003e\n\u003cp data-start=\"2473\" data-end=\"2530\"\u003eMany people imagine Earth’s magnetic field as horizontal.\u003c\/p\u003e\n\u003cp data-start=\"2532\" data-end=\"2596\"\u003eBut it is actually tilted downward into Earth at most locations.\u003c\/p\u003e\n\u003cp data-start=\"2598\" data-end=\"2631\"\u003eThis tilt is called magnetic dip.\u003c\/p\u003e\n\u003cp data-start=\"2672\" data-end=\"2766\"\u003eA freely suspended magnet therefore tries to align not only horizontally, but also vertically.\u003c\/p\u003e\n\u003cp data-start=\"2768\" data-end=\"2814\"\u003eThat means Earth’s magnetic field is truly 3-D.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1tbfk1p\" data-start=\"2821\" data-end=\"2839\"\u003eThe Big Question\u003c\/h1\u003e\n\u003ch2 data-section-id=\"jlrb6t\" data-start=\"2841\" data-end=\"2892\"\u003eHow Can We Let the Magnet Rotate About Any Axis?\u003c\/h2\u003e\n\u003cp data-start=\"2894\" data-end=\"2948\"\u003eOrdinary hanging allows mainly one rotational freedom.\u003c\/p\u003e\n\u003cp data-start=\"2950\" data-end=\"3015\"\u003eBut a true 3D magnetic compass would allow unrestricted rotation.\u003c\/p\u003e\n\u003cp data-start=\"3017\" data-end=\"3061\"\u003eThis leads to fascinating engineering ideas:\u003c\/p\u003e\n\u003cul data-start=\"3063\" data-end=\"3180\"\u003e\n\u003cli data-section-id=\"4yivaf\" data-start=\"3063\" data-end=\"3090\"\u003eGimbal suspension systems\u003c\/li\u003e\n\u003cli data-section-id=\"7kb0kx\" data-start=\"3091\" data-end=\"3108\"\u003eMagnetic pivots\u003c\/li\u003e\n\u003cli data-section-id=\"18w8esf\" data-start=\"3109\" data-end=\"3127\"\u003eFloating magnets\u003c\/li\u003e\n\u003cli data-section-id=\"2as9gm\" data-start=\"3128\" data-end=\"3150\"\u003eSpherical suspension\u003c\/li\u003e\n\u003cli data-section-id=\"122akdf\" data-start=\"3151\" data-end=\"3180\"\u003eSpacecraft attitude sensors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3182\" data-end=\"3277\"\u003eHow to create a fully free magnetic orientation system?\u003c\/p\u003e\n\u003cp data-start=\"3279\" data-end=\"3368\"\u003eThat transition — from observation to invention — is what makes this experiment powerful.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1asgm44\" data-start=\"3375\" data-end=\"3419\"\u003eConnection to Navigation and Earth Science\u003c\/h1\u003e\n\u003cp data-start=\"3421\" data-end=\"3458\"\u003eThis experiment connects directly to:\u003c\/p\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"3460\" data-end=\"3698\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"3460\" data-end=\"3504\"\u003e\n\u003ctr data-start=\"3460\" data-end=\"3504\"\u003e\n\u003cth data-start=\"3460\" data-end=\"3478\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eExperiment Idea\u003c\/th\u003e\n\u003cth data-start=\"3478\" data-end=\"3504\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eReal-World Application\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"3515\" data-end=\"3698\"\u003e\n\u003ctr data-start=\"3515\" data-end=\"3545\"\u003e\n\u003ctd data-start=\"3515\" data-end=\"3534\" data-col-size=\"sm\"\u003eSuspended magnet\u003c\/td\u003e\n\u003ctd data-start=\"3534\" data-end=\"3545\" data-col-size=\"sm\"\u003eCompass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3546\" data-end=\"3581\"\u003e\n\u003ctd data-start=\"3546\" data-end=\"3567\" data-col-size=\"sm\"\u003eMagnetic alignment\u003c\/td\u003e\n\u003ctd data-start=\"3567\" data-end=\"3581\" data-col-size=\"sm\"\u003eNavigation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3582\" data-end=\"3611\"\u003e\n\u003ctd data-start=\"3582\" data-end=\"3597\" data-col-size=\"sm\"\u003eMagnetic dip\u003c\/td\u003e\n\u003ctd data-start=\"3597\" data-end=\"3611\" data-col-size=\"sm\"\u003eGeophysics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3612\" data-end=\"3648\"\u003e\n\u003ctd data-start=\"3612\" data-end=\"3628\" data-col-size=\"sm\"\u003eMagnetic axis\u003c\/td\u003e\n\u003ctd data-start=\"3628\" data-end=\"3648\" data-col-size=\"sm\"\u003eMaterial science\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3649\" data-end=\"3698\"\u003e\n\u003ctd data-start=\"3649\" data-end=\"3665\" data-col-size=\"sm\"\u003eFree rotation\u003c\/td\u003e\n\u003ctd data-start=\"3665\" data-end=\"3698\" data-col-size=\"sm\"\u003eSatellite orientation systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cmeta content=\"text\/html; charset=utf-8\" http-equiv=\"content-type\"\u003eA scientific instrument can emerge from observing nature carefully.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Geometers","offers":[{"title":"Default Title","offer_id":45882379239560,"sku":null,"price":0.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/3891\/4952\/files\/IMG_0939.jpg?v=1779692211"},{"product_id":"when-heat-defeats-magnetism","title":"When Heat Defeats Magnetism","description":"\u003ch2\u003e\n\u003cmeta content=\"text\/html; charset=utf-8\" http-equiv=\"content-type\"\u003eA paper clip hangs in midair, seemingly defying gravity.\u003c\/h2\u003e\n\u003cp data-start=\"819\" data-end=\"930\"\u003eA magnet pulls it upward while a thread pulls it downward. The forces balance, creating a delicate equilibrium.\u003c\/p\u003e\n\u003cp data-start=\"932\" data-end=\"956\"\u003eNow comes the challenge:\u003c\/p\u003e\n\u003cblockquote data-start=\"958\" data-end=\"1030\"\u003e\n\u003cp data-start=\"960\" data-end=\"1030\"\u003eCan heat destroy the magnetic attraction and make the paper clip fall?\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003ch2 data-start=\"1037\" data-end=\"1060\"\u003eWhat You Will Observe\u003c\/h2\u003e\n\u003cp data-start=\"1062\" data-end=\"1121\"\u003eA ring magnet is suspended with its symmetry axis vertical.\u003c\/p\u003e\n\u003cp data-start=\"1123\" data-end=\"1164\"\u003eA paper clip is tied to a thread so that:\u003c\/p\u003e\n\u003cul data-start=\"1166\" data-end=\"1288\"\u003e\n\u003cli data-start=\"1166\" data-end=\"1193\"\u003eGravity pulls it downward\u003c\/li\u003e\n\u003cli data-start=\"1194\" data-end=\"1231\"\u003eMagnetic attraction pulls it upward\u003c\/li\u003e\n\u003cli data-start=\"1232\" data-end=\"1288\"\u003eThe clip remains suspended without touching the magnet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1327\" data-end=\"1368\"\u003eThe paper clip appears to float in space.\u003c\/p\u003e\n\u003ch2 data-start=\"1375\" data-end=\"1391\"\u003ePrediction\u003c\/h2\u003e\n\u003cp data-start=\"1393\" data-end=\"1471\"\u003eMost magnetic materials lose their magnetic behaviour when heated sufficiently.\u003c\/p\u003e\n\u003cp data-start=\"1473\" data-end=\"1547\"\u003eThis happens at a characteristic temperature called the Curie temperature.\u003c\/p\u003e\n\u003cp data-start=\"1549\" data-end=\"1577\"\u003eBelow the Curie temperature:\u003c\/p\u003e\n\u003cul data-start=\"1579\" data-end=\"1647\"\u003e\n\u003cli data-start=\"1579\" data-end=\"1619\"\u003eAtomic magnetic moments tend to align.\u003c\/li\u003e\n\u003cli data-start=\"1620\" data-end=\"1647\"\u003eMagnetic order dominates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1649\" data-end=\"1677\"\u003eAbove the Curie temperature:\u003c\/p\u003e\n\u003cul data-start=\"1679\" data-end=\"1769\"\u003e\n\u003cli data-start=\"1679\" data-end=\"1718\"\u003eThermal agitation disrupts alignment.\u003c\/li\u003e\n\u003cli data-start=\"1719\" data-end=\"1740\"\u003eDisorder dominates.\u003c\/li\u003e\n\u003cli data-start=\"1741\" data-end=\"1769\"\u003eFerromagnetism disappears.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1771\" data-end=\"1844\"\u003eThe transition is one of the most important phase transitions in physics.\u003c\/p\u003e\n\u003ch2 data-start=\"1851\" data-end=\"1864\"\u003ePhysics\u003c\/h2\u003e\n\u003cp data-start=\"1866\" data-end=\"1934\"\u003eThe competition is between magnetic interactions and thermal motion.\u003c\/p\u003e\n\u003cp data-start=\"1936\" data-end=\"1955\"\u003eAt low temperature:\u003c\/p\u003e\n\u003cul data-start=\"1957\" data-end=\"1979\"\u003e\n\u003cli data-start=\"1957\" data-end=\"1979\"\u003eMagnetic order wins.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1981\" data-end=\"2001\"\u003eAt high temperature:\u003c\/p\u003e\n\u003cul data-start=\"2003\" data-end=\"2027\"\u003e\n\u003cli data-start=\"2003\" data-end=\"2027\"\u003eThermal disorder wins.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2029\" data-end=\"2086\"\u003eThe critical temperature is called the Curie temperature. \u003cmeta content=\"text\/html; charset=utf-8\" http-equiv=\"content-type\"\u003eAbove this temperature, a ferromagnetic material becomes only weakly magnetic.\u003c\/p\u003e\n\u003ch2 data-start=\"2212\" data-end=\"2243\"\u003eAttempt 1: Electrical Heating\u003c\/h2\u003e\n\u003cp data-start=\"2245\" data-end=\"2338\"\u003eThe paper clip was bent so that a battery could be connected across it using crocodile clips.\u003c\/p\u003e\n\u003cp data-start=\"2340\" data-end=\"2373\"\u003eCurrent flowed through the metal.\u003c\/p\u003e\n\u003cp data-start=\"2375\" data-end=\"2402\"\u003eThe expectation was simple:\u003c\/p\u003e\n\u003col data-start=\"2404\" data-end=\"2505\"\u003e\n\u003cli data-start=\"2404\" data-end=\"2432\"\u003eCurrent produces heating.\u003c\/li\u003e\n\u003cli data-start=\"2433\" data-end=\"2454\"\u003eTemperature rises.\u003c\/li\u003e\n\u003cli data-start=\"2455\" data-end=\"2486\"\u003eMagnetic attraction weakens.\u003c\/li\u003e\n\u003cli data-start=\"2487\" data-end=\"2505\"\u003eThe clip falls.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-start=\"2507\" data-end=\"2541\"\u003eBut something unexpected happened.\u003c\/p\u003e\n\u003cp data-start=\"2543\" data-end=\"2588\"\u003eThe clip became warm, yet remained suspended.\u003c\/p\u003e\n\u003cp data-start=\"2590\" data-end=\"2653\"\u003ePerhaps the temperature never approached the Curie temperature.\u003c\/p\u003e\n\u003cp data-start=\"2655\" data-end=\"2702\"\u003eOr perhaps something more subtle was occurring.\u003c\/p\u003e\n\u003ch2 data-start=\"2709\" data-end=\"2736\"\u003eAttempt 2: Candle Heating\u003c\/h2\u003e\n\u003cp data-start=\"2738\" data-end=\"2768\"\u003eThe next step was more direct.\u003c\/p\u003e\n\u003cp data-start=\"2770\" data-end=\"2817\"\u003eA candle flame was used to heat the paper clip.\u003c\/p\u003e\n\u003cp data-start=\"2819\" data-end=\"2859\"\u003eThe clip became much hotter than before.\u003c\/p\u003e\n\u003cp data-start=\"2861\" data-end=\"2892\"\u003eAgain the prediction was clear:\u003c\/p\u003e\n\u003cblockquote data-start=\"2894\" data-end=\"2959\"\u003e\n\u003cp data-start=\"2896\" data-end=\"2959\"\u003eHeat the clip enough, remove its magnetism, and it should fall.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003cp data-start=\"2961\" data-end=\"2987\"\u003eBut it still did not fall.\u003c\/p\u003e\n\u003cp data-start=\"2989\" data-end=\"3021\"\u003eThe result raises new questions.\u003c\/p\u003e\n\u003ch2 data-start=\"3028\" data-end=\"3041\"\u003eMystery\u003c\/h2\u003e\n\u003cp data-start=\"3043\" data-end=\"3076\"\u003eWhy did the clip remain attached?\u003c\/p\u003e\n\u003cp data-start=\"3078\" data-end=\"3106\"\u003eSeveral possibilities exist:\u003c\/p\u003e\n\u003ch3 data-start=\"3108\" data-end=\"3125\"\u003ePossibility 1\u003c\/h3\u003e\n\u003cp data-start=\"3126\" data-end=\"3171\"\u003eThe clip never reached its Curie temperature.\u003c\/p\u003e\n\u003cp data-start=\"3173\" data-end=\"3244\"\u003eMany steels have Curie temperatures of several hundred degrees Celsius.\u003c\/p\u003e\n\u003cp data-start=\"3246\" data-end=\"3310\"\u003eA candle flame may not have heated the entire clip sufficiently.\u003c\/p\u003e\n\u003ch3 data-start=\"3312\" data-end=\"3329\"\u003ePossibility 2\u003c\/h3\u003e\n\u003cp data-start=\"3330\" data-end=\"3363\"\u003eOnly part of the clip became hot.\u003c\/p\u003e\n\u003cp data-start=\"3365\" data-end=\"3412\"\u003eThe cooler sections may have remained magnetic.\u003c\/p\u003e\n\u003ch3 data-start=\"3414\" data-end=\"3431\"\u003ePossibility 3\u003c\/h3\u003e\n\u003cp data-start=\"3432\" data-end=\"3525\"\u003eThe magnetic field from the ring magnet may still induce magnetization in the cooler regions.\u003c\/p\u003e\n\u003ch3 data-start=\"3527\" data-end=\"3544\"\u003ePossibility 4\u003c\/h3\u003e\n\u003cp data-start=\"3545\" data-end=\"3625\"\u003eThe material of the paper clip may not behave exactly as expected under heating.\u003c\/p\u003e\n\u003ch3 data-start=\"3627\" data-end=\"3644\"\u003ePossibility 5\u003c\/h3\u003e\n\u003cp data-start=\"3645\" data-end=\"3714\"\u003eThe Curie temperature may have been reached only briefly and locally.\u003c\/p\u003e\n\u003ch2 data-start=\"3721\" data-end=\"3737\"\u003eYour Challenge\u003c\/h2\u003e\n\u003cp data-start=\"3739\" data-end=\"3788\"\u003eThis experiment is intentionally left unfinished.\u003c\/p\u003e\n\u003cp data-start=\"3790\" data-end=\"3817\"\u003eCan you make the clip fall?\u003c\/p\u003e\n\u003cp data-start=\"3819\" data-end=\"3847\"\u003ePossible approaches include:\u003c\/p\u003e\n\u003cul data-start=\"3849\" data-end=\"4065\"\u003e\n\u003cli data-start=\"3849\" data-end=\"3871\"\u003eUsing a butane torch\u003c\/li\u003e\n\u003cli data-start=\"3872\" data-end=\"3895\"\u003eUsing a propane flame\u003c\/li\u003e\n\u003cli data-start=\"3896\" data-end=\"3928\"\u003eMeasuring temperature directly\u003c\/li\u003e\n\u003cli data-start=\"3929\" data-end=\"3966\"\u003eTrying different magnetic materials\u003c\/li\u003e\n\u003cli data-start=\"3967\" data-end=\"3998\"\u003eTesting different paper clips\u003c\/li\u003e\n\u003cli data-start=\"3999\" data-end=\"4023\"\u003eUsing stronger magnets\u003c\/li\u003e\n\u003cli data-start=\"4024\" data-end=\"4065\"\u003eRecording the experiment in slow motion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4067\" data-end=\"4118\"\u003eThe goal is not simply to reproduce a known result.\u003c\/p\u003e\n\u003cp data-start=\"4120\" data-end=\"4185\"\u003eThe goal is to investigate why the expected result did not occur.\u003c\/p\u003e\n\u003ch3 data-start=\"4224\" data-end=\"4268\"\u003e\u003cstrong\u003eThis experiment connects several deep ideas:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"4270\" data-end=\"4629\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"4270\" data-end=\"4298\"\u003e\n\u003ctr data-start=\"4270\" data-end=\"4298\"\u003e\n\u003cth data-start=\"4270\" data-end=\"4280\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eConcept\u003c\/th\u003e\n\u003cth data-start=\"4280\" data-end=\"4298\" data-col-size=\"md\" class=\"last:pe-10\"\u003eWhat You Learn\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"4328\" data-end=\"4629\"\u003e\n\u003ctr data-start=\"4328\" data-end=\"4389\"\u003e\n\u003ctd data-start=\"4328\" data-end=\"4340\" data-col-size=\"sm\"\u003eMagnetism\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"4340\" data-end=\"4389\"\u003eMagnetic attraction and induced magnetization\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4390\" data-end=\"4439\"\u003e\n\u003ctd data-start=\"4390\" data-end=\"4408\" data-col-size=\"sm\"\u003eThermal Physics\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"4408\" data-end=\"4439\"\u003eHeating and energy transfer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4440\" data-end=\"4481\"\u003e\n\u003ctd data-start=\"4440\" data-end=\"4460\" data-col-size=\"sm\"\u003ePhase Transitions\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"4460\" data-end=\"4481\"\u003eCurie temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4482\" data-end=\"4517\"\u003e\n\u003ctd data-start=\"4482\" data-end=\"4496\" data-col-size=\"sm\"\u003eEquilibrium\u003c\/td\u003e\n\u003ctd data-start=\"4496\" data-end=\"4517\" data-col-size=\"md\"\u003eBalance of forces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4518\" data-end=\"4584\"\u003e\n\u003ctd data-start=\"4518\" data-end=\"4538\" data-col-size=\"sm\"\u003eMaterials Science\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"4538\" data-end=\"4584\"\u003eProperties of steel and magnetic materials\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4585\" data-end=\"4629\"\u003e\n\u003ctd data-start=\"4585\" data-end=\"4605\" data-col-size=\"sm\"\u003eScientific Method\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"4605\" data-end=\"4629\"\u003ePredictions can fail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cmeta content=\"text\/html; charset=utf-8\" http-equiv=\"content-type\"\u003eA surprising result is often more valuable than a successful demonstration.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Geometers","offers":[{"title":"Default Title","offer_id":45914121896072,"sku":null,"price":0.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/3891\/4952\/files\/1_729266dc-df11-4a9d-968c-8d41db514a38.jpg?v=1780031212"},{"product_id":"when-electricity-becomes-magnetism","title":"When Electricity Becomes Magnetism","description":"\u003ch3 data-start=\"924\" data-end=\"954\"\u003e\u003cstrong\u003eA copper wire is not a magnet.\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3 data-start=\"956\" data-end=\"1000\"\u003e\u003cstrong\u003eA compass placed nearby remains undisturbed.\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3 data-start=\"1002\" data-end=\"1031\"\u003e\u003cstrong\u003eA magnet feels no attraction.\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3 data-start=\"1033\" data-end=\"1057\"\u003e\u003cstrong\u003eNothing unusual happens.\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3 data-start=\"1059\" data-end=\"1083\"\u003e\u003cstrong\u003eThen a switch is closed.\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3 data-start=\"1085\" data-end=\"1094\"\u003e\u003cstrong\u003eSuddenly:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1096\" data-end=\"1195\"\u003e\n\u003cli data-start=\"1096\" data-end=\"1123\" style=\"font-weight: bold;\"\u003e\n\u003ch3\u003e\u003cstrong\u003eThe compass needle turns.\u003c\/strong\u003e\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1124\" data-end=\"1141\" style=\"font-weight: bold;\"\u003e\n\u003ch3\u003e\u003cstrong\u003eThe wire moves.\u003c\/strong\u003e\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1142\" data-end=\"1195\" style=\"font-weight: bold;\"\u003e\n\u003ch3\u003e\u003cstrong\u003eA magnetic field appears where none existed before.\u003c\/strong\u003e\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1197\" data-end=\"1210\"\u003e\u003cstrong\u003eWhat changed?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3 data-start=\"1212\" data-end=\"1268\"\u003e\u003cstrong\u003eA moving electric charge began flowing through the wire.\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3 data-start=\"1270\" data-end=\"1315\"\u003e\n\u003cstrong\u003eAnd with that simple act, magnetism was born.\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1 data-start=\"1918\" data-end=\"1943\"\u003eThe Historical Surprise\u003c\/h1\u003e\n\u003cp data-start=\"1945\" data-end=\"2040\"\u003eIn 1820, the Danish physicist \u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eHans Christian Ørsted\u003c\/span\u003e\u003c\/span\u003e made a similar observation.\u003c\/p\u003e\n\u003cp data-start=\"2042\" data-end=\"2120\"\u003eHe noticed that a compass needle moved when an electric current flowed nearby.\u003c\/p\u003e\n\u003cp data-start=\"2122\" data-end=\"2170\"\u003eThis simple observation changed physics forever.\u003c\/p\u003e\n\u003cp data-start=\"2172\" data-end=\"2194\"\u003eBefore this discovery:\u003c\/p\u003e\n\u003cul data-start=\"2196\" data-end=\"2253\"\u003e\n\u003cli data-start=\"2196\" data-end=\"2253\"\u003eElectricity and magnetism were thought to be unrelated.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2255\" data-end=\"2264\"\u003eAfter it:\u003c\/p\u003e\n\u003cul data-start=\"2266\" data-end=\"2315\"\u003e\n\u003cli data-start=\"2266\" data-end=\"2315\"\u003eScientists realized they were deeply connected.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2317\" data-end=\"2411\"\u003eThe modern world of motors, generators, electronics, and communication grew from this insight.\u003c\/p\u003e\n\u003ch1 data-start=\"2418\" data-end=\"2438\"\u003eWhat Is Happening?\u003c\/h1\u003e\n\u003cp data-start=\"2440\" data-end=\"2493\"\u003eElectric current consists of moving electric charges.\u003c\/p\u003e\n\u003cp data-start=\"2495\" data-end=\"2556\"\u003eThose moving charges create a magnetic field around the wire.\u003c\/p\u003e\n\u003cp data-start=\"2558\" data-end=\"2615\"\u003eThe field forms circular loops surrounding the conductor.\u003c\/p\u003e\n\u003cp data-start=\"2656\" data-end=\"2734\"\u003eThe compass responds because it aligns with this newly created magnetic field.\u003c\/p\u003e\n\u003cp data-start=\"2736\" data-end=\"2803\"\u003eThe wire responds because magnetic fields exert forces on currents.\u003c\/p\u003e\n\u003cp data-start=\"2833\" data-end=\"2896\"\u003eThe experiment does more than reveal a new source of magnetism.\u003c\/p\u003e\n\u003cp data-start=\"2898\" data-end=\"2928\"\u003eIt raises a profound question:\u003c\/p\u003e\n\u003cblockquote data-start=\"2930\" data-end=\"3024\"\u003e\n\u003cp data-start=\"2932\" data-end=\"3024\"\u003e\u003cstrong\u003eIf electric current creates magnetism, could all magnetism originate from electric currents?\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003cp data-start=\"3026\" data-end=\"3102\"\u003eThis question led physicists toward a deeper understanding of matter itself.\u003c\/p\u003e\n\u003ch1 data-start=\"3109\" data-end=\"3135\"\u003eA Mystery Inside Magnets\u003c\/h1\u003e\n\u003cp data-start=\"3137\" data-end=\"3192\"\u003ePermanent magnets produce magnetic fields continuously.\u003c\/p\u003e\n\u003cp data-start=\"3194\" data-end=\"3219\"\u003eBut where is the current?\u003c\/p\u003e\n\u003cp data-start=\"3221\" data-end=\"3244\"\u003eNo wires are connected.\u003c\/p\u003e\n\u003cp data-start=\"3246\" data-end=\"3268\"\u003eNo battery is present.\u003c\/p\u003e\n\u003cp data-start=\"3270\" data-end=\"3301\"\u003eYet the magnetic field remains.\u003c\/p\u003e\n\u003cp data-start=\"3303\" data-end=\"3332\"\u003eThe answer lies inside atoms.\u003c\/p\u003e\n\u003cp data-start=\"3334\" data-end=\"3391\"\u003eElectrons possess intrinsic angular momentum called spin.\u003c\/p\u003e\n\u003cp data-start=\"3393\" data-end=\"3429\"\u003eThey also move around atomic nuclei.\u003c\/p\u003e\n\u003cp data-start=\"3431\" data-end=\"3486\"\u003eThese microscopic motions create tiny magnetic moments.\u003c\/p\u003e\n\u003cp data-start=\"3488\" data-end=\"3510\"\u003eIn ordinary materials:\u003c\/p\u003e\n\u003cul data-start=\"3512\" data-end=\"3577\"\u003e\n\u003cli data-start=\"3512\" data-end=\"3553\"\u003eThe moments point in random directions.\u003c\/li\u003e\n\u003cli data-start=\"3554\" data-end=\"3577\"\u003eTheir effects cancel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3579\" data-end=\"3601\"\u003eIn magnetic materials:\u003c\/p\u003e\n\u003cul data-start=\"3603\" data-end=\"3664\"\u003e\n\u003cli data-start=\"3603\" data-end=\"3624\"\u003eMany moments align.\u003c\/li\u003e\n\u003cli data-start=\"3625\" data-end=\"3664\"\u003eA large-scale magnetic field emerges.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3666\" data-end=\"3780\"\u003eWhat appears to be a permanent magnet is actually the collective effect of countless microscopic magnetic moments.\u003c\/p\u003e\n\u003ch1 data-start=\"3787\" data-end=\"3813\"\u003eA Remarkable Realization\u003c\/h1\u003e\n\u003cp data-start=\"3815\" data-end=\"3856\"\u003eThe hanging wire reveals a stunning idea:\u003c\/p\u003e\n\u003cblockquote data-start=\"3858\" data-end=\"3913\"\u003e\n\u003cp data-start=\"3860\" data-end=\"3913\"\u003eMagnetism and electricity are not separate phenomena.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003cp data-start=\"3915\" data-end=\"3980\"\u003eThey are different manifestations of the same underlying physics.\u003c\/p\u003e\n\u003cp data-start=\"3982\" data-end=\"4017\"\u003eThis realization eventually led to:\u003c\/p\u003e\n\u003cul data-start=\"4019\" data-end=\"4124\"\u003e\n\u003cli data-start=\"4019\" data-end=\"4035\"\u003eElectromagnets\u003c\/li\u003e\n\u003cli data-start=\"4036\" data-end=\"4053\"\u003eElectric motors\u003c\/li\u003e\n\u003cli data-start=\"4054\" data-end=\"4066\"\u003eGenerators\u003c\/li\u003e\n\u003cli data-start=\"4067\" data-end=\"4081\"\u003eTransformers\u003c\/li\u003e\n\u003cli data-start=\"4082\" data-end=\"4103\"\u003eRadio communication\u003c\/li\u003e\n\u003cli data-start=\"4104\" data-end=\"4124\"\u003eModern electronics\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Geometers","offers":[{"title":"Default Title","offer_id":45918812930184,"sku":null,"price":0.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/3891\/4952\/files\/3_a6428926-77af-475f-975e-d7a8f3260a77.jpg?v=1780308097"},{"product_id":"building-a-magnet-with-electricity","title":"Building a Magnet with Electricity","description":"\u003ch3 data-start=\"835\" data-end=\"891\"\u003e\u003cstrong\u003eA copper wire alone produces only a weak magnetic field.\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3 data-start=\"893\" data-end=\"935\"\u003e\u003cstrong\u003eAn iron nail alone is not a strong magnet.\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3 data-start=\"937\" data-end=\"994\"\u003e\u003cstrong\u003eBut bring them together and something remarkable happens.\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3 data-start=\"996\" data-end=\"1118\"\u003e\u003cstrong\u003eWith a battery, a coil of wire, and an iron nail, we can create a magnet powerful enough to lift metal objects.\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3 data-start=\"1120\" data-end=\"1263\"\u003e\u003cstrong\u003eThis is the principle behind electromagnets—the technology that powers cranes, relays, electric motors, speakers, and countless modern devices.\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch1 data-start=\"1270\" data-end=\"1284\"\u003eThe Question\u003c\/h1\u003e\n\u003cp data-start=\"1286\" data-end=\"1374\"\u003eIn one of the experiment we discovered that electric current creates a magnetic field.\u003c\/p\u003e\n\u003cp data-start=\"1376\" data-end=\"1410\"\u003eBut that field is relatively weak.\u003c\/p\u003e\n\u003cp data-start=\"1412\" data-end=\"1433\"\u003eCan we strengthen it?\u003c\/p\u003e\n\u003cp data-start=\"1435\" data-end=\"1536\"\u003eCan electricity be used to create a magnet stronger than the magnetic field produced by a wire alone?\u003c\/p\u003e\n\u003ch1 data-start=\"1543\" data-end=\"1572\"\u003eChoosing the Right Material\u003c\/h1\u003e\n\u003cp data-start=\"1574\" data-end=\"1627\"\u003eNot all materials respond equally to magnetic fields.\u003c\/p\u003e\n\u003cp data-start=\"1629\" data-end=\"1673\"\u003eTo investigate, several objects were tested:\u003c\/p\u003e\n\u003cul data-start=\"1675\" data-end=\"1713\"\u003e\n\u003cli data-start=\"1675\" data-end=\"1688\"\u003ePaper clips\u003c\/li\u003e\n\u003cli data-start=\"1689\" data-end=\"1701\"\u003eSteel wire\u003c\/li\u003e\n\u003cli data-start=\"1702\" data-end=\"1713\"\u003eIron nail\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1715\" data-end=\"1754\"\u003eEach object was brought near a compass.\u003c\/p\u003e\n\u003cp data-start=\"1756\" data-end=\"1776\"\u003eThe idea was simple:\u003c\/p\u003e\n\u003cp data-start=\"1778\" data-end=\"1870\"\u003eIf a material becomes magnetized easily, it should disturb the compass needle more strongly.\u003c\/p\u003e\n\u003cp data-start=\"1872\" data-end=\"1946\"\u003eAmong the tested materials, the iron nail produced the largest deflection.\u003c\/p\u003e\n\u003cp data-start=\"1948\" data-end=\"2024\"\u003eThis suggested that it was the best candidate for building an electromagnet.\u003c\/p\u003e\n\u003ch1 data-start=\"2031\" data-end=\"2050\"\u003eWhy an Iron Nail?\u003c\/h1\u003e\n\u003cp data-start=\"2052\" data-end=\"2105\"\u003eIron contains countless microscopic magnetic domains.\u003c\/p\u003e\n\u003cp data-start=\"2107\" data-end=\"2155\"\u003eNormally these domains point in many directions.\u003c\/p\u003e\n\u003cp data-start=\"2157\" data-end=\"2186\"\u003eTheir effects largely cancel.\u003c\/p\u003e\n\u003cp data-start=\"2188\" data-end=\"2263\"\u003eWhen exposed to a magnetic field, many domains align in the same direction.\u003c\/p\u003e\n\u003cp data-start=\"2265\" data-end=\"2293\"\u003eThe iron becomes magnetized.\u003c\/p\u003e\n\u003cp data-start=\"2295\" data-end=\"2347\"\u003eThis property makes iron an excellent magnetic core.\u003c\/p\u003e\n\u003ch1 data-start=\"2354\" data-end=\"2375\"\u003eThe Power of a Coil\u003c\/h1\u003e\n\u003cp data-start=\"2377\" data-end=\"2435\"\u003eA straight wire carrying current creates a magnetic field.\u003c\/p\u003e\n\u003cp data-start=\"2437\" data-end=\"2484\"\u003eHowever, there is a more efficient arrangement.\u003c\/p\u003e\n\u003cp data-start=\"2486\" data-end=\"2520\"\u003eThe wire can be wound into a coil.\u003c\/p\u003e\n\u003cp data-start=\"2522\" data-end=\"2560\"\u003eThis arrangement is called a solenoid.\u003c\/p\u003e\n\u003cp data-start=\"2562\" data-end=\"2645\"\u003eInside a solenoid, the magnetic fields produced by each turn reinforce one another.\u003c\/p\u003e\n\u003cp data-start=\"2647\" data-end=\"2709\"\u003eThe result is a much stronger and more uniform magnetic field.\u003c\/p\u003e\n\u003cp data-start=\"2647\" data-end=\"2709\"\u003e\u003cmeta content=\"text\/html; charset=utf-8\" http-equiv=\"content-type\"\u003eMore turns and more current generally produce a stronger magnetic field.\u003c\/p\u003e\n\u003ch1 data-start=\"2908\" data-end=\"2936\"\u003eBuilding the Electromagnet\u003c\/h1\u003e\n\u003cp data-start=\"2938\" data-end=\"2997\"\u003eThe enamelled copper wire was wrapped around the iron nail.\u003c\/p\u003e\n\u003cp data-start=\"2999\" data-end=\"3051\"\u003eThe nail was then placed near a pile of paper clips.\u003c\/p\u003e\n\u003cp data-start=\"3053\" data-end=\"3080\"\u003eAt first, nothing happened.\u003c\/p\u003e\n\u003cp data-start=\"3082\" data-end=\"3130\"\u003eThe nail behaved like an ordinary piece of iron.\u003c\/p\u003e\n\u003cp data-start=\"3132\" data-end=\"3163\"\u003eThen the battery was connected.\u003c\/p\u003e\n\u003cp data-start=\"3165\" data-end=\"3204\"\u003eCurrent began flowing through the coil.\u003c\/p\u003e\n\u003cp data-start=\"3206\" data-end=\"3258\"\u003eImmediately, the paper clips jumped toward the nail.\u003c\/p\u003e\n\u003cp data-start=\"3260\" data-end=\"3289\"\u003eThe nail had become a magnet.\u003c\/p\u003e\n\u003ch1 data-start=\"3296\" data-end=\"3312\"\u003eWhat Happened?\u003c\/h1\u003e\n\u003cp data-start=\"3314\" data-end=\"3376\"\u003eThe current flowing through the coil created a magnetic field.\u003c\/p\u003e\n\u003cp data-start=\"3378\" data-end=\"3414\"\u003eThat field magnetized the iron nail.\u003c\/p\u003e\n\u003cp data-start=\"3416\" data-end=\"3503\"\u003eThe iron core then produced its own magnetic field, aligned with the field of the coil.\u003c\/p\u003e\n\u003cp data-start=\"3505\" data-end=\"3594\"\u003eTogether they generated a much stronger magnetic field than the wire alone could produce.\u003c\/p\u003e\n\u003cp data-start=\"3596\" data-end=\"3671\"\u003eYou can think of the iron as amplifying the magnetic effect of the current.\u003c\/p\u003e\n\u003ch1 data-start=\"3678\" data-end=\"3693\"\u003eA Deeper View\u003c\/h1\u003e\n\u003cp data-start=\"3695\" data-end=\"3748\"\u003eThe iron nail does not create magnetism from nothing.\u003c\/p\u003e\n\u003cp data-start=\"3750\" data-end=\"3844\"\u003eInstead, the magnetic field of the coil causes many magnetic domains inside the iron to align.\u003c\/p\u003e\n\u003cp data-start=\"3846\" data-end=\"3921\"\u003eThe aligned domains reinforce one another and strengthen the overall field.\u003c\/p\u003e\n\u003cp data-start=\"3923\" data-end=\"4014\"\u003eThis is why the electromagnet can attract objects much more effectively than the bare wire.\u003c\/p\u003e\n\u003ch1 data-start=\"4021\" data-end=\"4053\"\u003eWhy Electromagnets Are Special\u003c\/h1\u003e\n\u003cp data-start=\"4055\" data-end=\"4114\"\u003eUnlike permanent magnets, electromagnets can be controlled.\u003c\/p\u003e\n\u003cp data-start=\"4116\" data-end=\"4136\"\u003eTurn the current on:\u003c\/p\u003e\n\u003cul data-start=\"4138\" data-end=\"4159\"\u003e\n\u003cli data-start=\"4138\" data-end=\"4159\"\u003eThe magnet appears.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4161\" data-end=\"4182\"\u003eTurn the current off:\u003c\/p\u003e\n\u003cul data-start=\"4184\" data-end=\"4219\"\u003e\n\u003cli data-start=\"4184\" data-end=\"4219\"\u003eThe magnet weakens or disappears.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4221\" data-end=\"4311\"\u003eThis ability to switch magnetism on demand is one of the most useful ideas in engineering.\u003c\/p\u003e\n\u003ch1 data-start=\"4318\" data-end=\"4342\"\u003eReal-World Connections\u003c\/h1\u003e\n\u003cp data-start=\"4344\" data-end=\"4374\"\u003eElectromagnets are everywhere.\u003c\/p\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"4376\" data-end=\"4742\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"4376\" data-end=\"4415\"\u003e\n\u003ctr data-start=\"4376\" data-end=\"4415\"\u003e\n\u003cth data-start=\"4376\" data-end=\"4390\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eApplication\u003c\/th\u003e\n\u003cth data-start=\"4390\" data-end=\"4415\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eRole of Electromagnet\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"4455\" data-end=\"4742\"\u003e\n\u003ctr data-start=\"4455\" data-end=\"4503\"\u003e\n\u003ctd data-start=\"4455\" data-end=\"4475\" data-col-size=\"sm\"\u003eScrap-yard cranes\u003c\/td\u003e\n\u003ctd data-start=\"4475\" data-end=\"4503\" data-col-size=\"sm\"\u003eLift heavy steel objects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4504\" data-end=\"4551\"\u003e\n\u003ctd data-start=\"4504\" data-end=\"4522\" data-col-size=\"sm\"\u003eElectric motors\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"4522\" data-end=\"4551\"\u003eProduce rotational motion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4552\" data-end=\"4591\"\u003e\n\u003ctd data-start=\"4552\" data-end=\"4561\" data-col-size=\"sm\"\u003eRelays\u003c\/td\u003e\n\u003ctd data-start=\"4561\" data-end=\"4591\" data-col-size=\"sm\"\u003eSwitch electrical circuits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4592\" data-end=\"4637\"\u003e\n\u003ctd data-start=\"4592\" data-end=\"4603\" data-col-size=\"sm\"\u003eSpeakers\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"4603\" data-end=\"4637\"\u003eConvert electricity into sound\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4638\" data-end=\"4688\"\u003e\n\u003ctd data-start=\"4638\" data-end=\"4653\" data-col-size=\"sm\"\u003eMRI machines\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"4653\" data-end=\"4688\"\u003eGenerate strong magnetic fields\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4689\" data-end=\"4742\"\u003e\n\u003ctd data-start=\"4689\" data-end=\"4713\" data-col-size=\"sm\"\u003eParticle accelerators\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"4713\" data-end=\"4742\"\u003eControl charged particles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-start=\"4744\" data-end=\"4853\"\u003eA simple nail and coil demonstrate the same principle used in some of the world's most advanced technologies.\u003c\/p\u003e\n\u003ch1 data-start=\"4860\" data-end=\"4890\"\u003eWhat This Experiment Teaches\u003c\/h1\u003e\n\u003cul data-start=\"4892\" data-end=\"5039\"\u003e\n\u003cli data-start=\"4892\" data-end=\"4912\"\u003eMagnetic induction\u003c\/li\u003e\n\u003cli data-start=\"4913\" data-end=\"4933\"\u003eMagnetic materials\u003c\/li\u003e\n\u003cli data-start=\"4934\" data-end=\"4945\"\u003eSolenoids\u003c\/li\u003e\n\u003cli data-start=\"4946\" data-end=\"4964\"\u003eElectromagnetism\u003c\/li\u003e\n\u003cli data-start=\"4965\" data-end=\"4983\"\u003eMagnetic domains\u003c\/li\u003e\n\u003cli data-start=\"4984\" data-end=\"5004\"\u003eEngineering design\u003c\/li\u003e\n\u003cli data-start=\"5005\" data-end=\"5039\"\u003eAmplification of magnetic fields\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"5041\" data-end=\"5073\"\u003eMost importantly, it shows that:\u003c\/p\u003e\n\u003cblockquote data-start=\"5075\" data-end=\"5154\"\u003e\n\u003cp data-start=\"5077\" data-end=\"5154\"\u003eElectricity can be used not only to create magnetism, but also to control it.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003cp data-start=\"5077\" data-end=\"5154\"\u003e \u003c\/p\u003e","brand":"Geometers","offers":[{"title":"Default Title","offer_id":45959883030664,"sku":null,"price":0.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/3891\/4952\/files\/1_d3fca0db-627e-49e0-b302-3be53dac8f46.jpg?v=1780556936"}],"url":"https:\/\/geometers.in\/collections\/experiments.oembed","provider":"Geometers","version":"1.0","type":"link"}