{"title":"Field Effects","description":"\u003cp\u003eOur range of field effects resources contain safely encased iron filings and are used to observe the effects of invisible magnetic fields. By holding a magnet to the surface of the Magnetic Field Pattern Window, the iron filings inside become magnetised and cluster into the lines that show the magnetic field which is otherwise invisible to the human eye.\u003c\/p\u003e","products":[{"product_id":"solenoid-superior","title":"Solenoid Superior","description":"\u003cp\u003eThis large solenoid offers a range of experiments around of magnetic fields and the transformer effect. Used with a variable d.c. supply and a Magnetic Flux Density Meter the field can be measured at various positions inside and outside the coil, for a range of currents.\u003cbr\u003e\r\nThe Solenoid’s main coil is of 200 turns, wound on a 50mm diameter tube. The overall length of the windings is 420mm. A second coil is wound on the same tube, with the same overall length. This coil is tapped at 5, 10, 20, 30, 50, 70 and 100 turns on either side of the centre, effectively offering a range of coils from 5 turns to 200 turns. The relationship between flux density, number of turns, current and length of coil can be fully investigated.\u003cbr\u003e\r\n4mm sockets are colour coded to encourage correct connection: black sockets – main 200 turn coil; red sockets – second coil 200 turns with tappings.\u003cbr\u003e\r\nUsed with a variable a.c. supply and suitable a.c. meters (e.g. Easy Read meter and 20V a.c. Attachment) students can investigate the behavior of a crude transformer. The two coils are used as primary and secondary winding in various turns ratios. The efficiency is very low. Steel laboratory retort stand rods can be used singly or in small numbers to provide a core for the transformer to illustrate increasing efficiency.\u003cbr\u003e\r\nThis introductory work can lead into investigation of practical transformer e.g. C-cores and Transformer Coils where the complete magnetic path provides much higher efficiency. Students can also extend their study using the Dissectible Transformer and its accessories, where they can investigate applications of transformer principles to induction and motors.\u003cbr\u003e\r\nMaximum Voltage:  6V a.c. and d.c.\u003cbr\u003e\r\nMaximum current:  7A a.c. and d.c.\u003cbr\u003e\r\nCoils: 200 turns 20swg copper wire + 200 turns 19swg tapped.\u003cbr\u003e\r\nSize: 530 x 175 x 115mm\u003c\/p\u003e\r\n","brand":"Philip Harris","offers":[{"title":"Default Title","offer_id":51272732475675,"sku":"HC1009236","price":242.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/4363\/4203\/files\/HC1009236.jpg?v=1769447657"},{"product_id":"round-iron-filings-bubble-pack-of-10","title":"Round Iron Filings Bubble Pack of 10","description":"\u003cp\u003eThe Iron filings bubble is suitable for more simple magnetic field plotting experiments in place of loose iron filings. It comprises a shallow, sealed, clear plastic vessel containing high quality fine iron filings. It can be used on an overhead projector for demonstrations.\u003c\/p\u003e\n\u003cp\u003eIn use, the filings are distributed evenly over the base of the bubble by shaking or tapping. The bubble is then placed over the magnet and gently tapped to permit the filings to align themselves in the magnetic field. \u003c\/p\u003e\n\u003cp\u003eDimensions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDiameter: 85mm\u003c\/li\u003e\n\u003cli\u003eDepth: 12 mm\u003c\/li\u003e\n\u003cli\u003ePack of 10\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shaw Magnets","offers":[{"title":"Default Title","offer_id":51273309749531,"sku":"50351","price":24.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/4363\/4203\/files\/50351.jpg?v=1771452053"},{"product_id":"round-iron-filings-bubble","title":"**Round Iron Filings Bubble","description":"\u003cp\u003e\u003cspan style=\"font-family: Verdana;\"\u003e\u003cspan style=\"font-size: 12px; line-height: normal;\"\u003eFilings encased in a plastic bubble, used to observe the effects of invisible magnetic fields.\u003c\/span\u003e\u003cbr style=\"margin: 0px; padding: 0px; font-size: 12px; line-height: normal;\"\u003e\u003cbr style=\"margin: 0px; padding: 0px; font-size: 12px; line-height: normal;\"\u003e\u003cstrong style=\"margin: 0px; padding: 0px; font-size: 12px; line-height: normal;\"\u003eSpecification\u003c\/strong\u003e\u003cbr style=\"margin: 0px; padding: 0px; font-size: 12px; line-height: normal;\"\u003e\u003cspan style=\"font-size: 12px; line-height: normal;\"\u003eSize: 85mm dia.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Tickit","offers":[{"title":"Default Title","offer_id":51273309782299,"sku":"50116","price":2.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/4363\/4203\/files\/50116.jpg?v=1771452055"},{"product_id":"iron-filings-shaker-250g","title":"Iron Filings Shaker","description":"\u003cp\u003e\u003cspan style=\"font-family: Verdana;\"\u003e\u003cspan style=\"font-size: 12px; line-height: normal;\"\u003eFilings encased in a plastic bubble, used to observe the effects of invisible magnetic fields.\u003c\/span\u003e\u003cbr style=\"margin: 0px; padding: 0px; font-size: 12px; line-height: normal;\"\u003e\u003cbr style=\"margin: 0px; padding: 0px; font-size: 12px; line-height: normal;\"\u003e\u003cstrong style=\"margin: 0px; padding: 0px; font-size: 12px; line-height: normal;\"\u003eSpecification\u003c\/strong\u003e\u003cbr style=\"margin: 0px; padding: 0px; font-size: 12px; line-height: normal;\"\u003e\u003cspan style=\"font-size: 12px; line-height: normal;\"\u003eSize: 85mm dia.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Shaw Magnets","offers":[{"title":"Default Title","offer_id":51273309847835,"sku":"50094","price":4.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/4363\/4203\/files\/50094.jpg?v=1771452057"},{"product_id":"magnetic-field-pattern-window-transparent","title":"Magnetic Field Pattern Window","description":"\u003cp\u003e\u003cspan style=\"font-family: Verdana;\"\u003e\u003cspan style=\"font-size: 12px; line-height: normal;\"\u003eA transparent frame containing magnetic powder in a water based solution for showing magnetic field patterns. When a magnet is present the particles of iron inside become slightly magnetised, so they attract each other and cluster into the lines that show the magnetic field patterns. Includes a pair of small ferrite block magnets and a pair of plastic cased bar magnets and teachers leaflet.\u003c\/span\u003e\u003cbr style=\"margin: 0px; padding: 0px; font-size: 12px; line-height: normal;\"\u003e\u003cbr style=\"margin: 0px; padding: 0px; font-size: 12px; line-height: normal;\"\u003e\u003cstrong style=\"margin: 0px; padding: 0px; font-size: 12px; line-height: normal;\"\u003eSpecification\u003c\/strong\u003e\u003cbr style=\"margin: 0px; padding: 0px; font-size: 12px; line-height: normal;\"\u003e\u003cspan style=\"font-size: 12px; line-height: normal;\"\u003eSize: 225 x 130 x 15mm.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Shaw Magnets","offers":[{"title":"Default Title","offer_id":51273310044443,"sku":"50143","price":58.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/4363\/4203\/files\/50143.jpg?v=1771452062"},{"product_id":"magnetic-globe-set","title":"**Magnetic Globe Set","description":"\u003cp\u003e\u003cspan style=\"font-size: 12px;\"\u003eThis two piece set comprises of a rubberised ball representing the Earth (with detailing of the continents and a strong magnet moulded within it to create an invisible exterior magnetic field, similar to that of the Earth) and a hand held magnet called a Magnetic Field Finder (which is a type of 3 dimensional compass). \u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 12px;\"\u003ePlace the Magnetic Field Finder near to the globe and it tilts and orientates itself to clearly show the strength, direction and position of the magnetic flux anywhere around the Earth Ball. The Magnetic Field Finder is also useful to reveal the 3 dimensional nature of magnetic fields around any Magnet and is a real step up from iron filings sprinkled onto a piece of paper. A really magical way to see and understand the Earth’s 3 dimensional Magnetic Field Pattern.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 12px;\"\u003eSpecification: \u003c\/span\u003e\u003cspan style=\"font-size: 12px; font-family: Verdana;\"\u003eSize of globe: 110mm dia.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Shaw Magnets","offers":[{"title":"Default Title","offer_id":51273310699803,"sku":"50417","price":45.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/4363\/4203\/files\/50417.jpg?v=1771452076"},{"product_id":"electromagnet","title":"Philip Harris Electromagnet","description":"\u003cp\u003eA powerful electromagnet comprising a 'U' shaped soft iron core 100mm x 65mm overall. Formed from a 16mm diameter bar. The windings are of 0.9mm enamelled copper wire wound on insulation bobbins, connected in series and provided with 4mm sockets.\u003c\/p\u003e\u003cp\u003eThe ends of the core are carefully ground to provide optimum magnetic contact with the armature, which is also ground flat.\u003c\/p\u003e\u003cp\u003eWinding resistance is approximately 0.5Ω\u003c\/p\u003e\u003cp\u003eA force of about 75N is required to pull the armature away from the core when 1A is flowing through the windings.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRecommended Current: 5A.\u003c\/li\u003e\n\u003cli\u003eMaximum Current: 8A\u003c\/li\u003e\n\u003cli\u003eInput Voltage: 4-6V\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003ca\u003eLearning Outcomes\u003c\/a\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003e\u003cstrong\u003eKey Stage 3 Physics - Electricity and Electromagnetism: \u003c\/strong\u003e\u003c\/em\u003eThe magnetic effect of a current, electromagnets, DC motors (principles only).   \u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003e\u003cstrong\u003eKey Stage 4 Physics – Forces: \u003c\/strong\u003e\u003c\/em\u003eForces and fields: electrostatic, magnetic, gravity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003e\u003cstrong\u003eKey Stage 4 Physics - Magnetism and Electromagnetism: \u003c\/strong\u003e\u003c\/em\u003eMagnetism and electromagnetism.  Exploring the magnetic fields of permanent and induced magnets, and the Earth’s magnetic field, using a compass.  Magnetic effects of currents, how solenoids enhance the effect.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Philip Harris","offers":[{"title":"Default Title","offer_id":51274682368283,"sku":"E8H26321","price":26.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/4363\/4203\/files\/philip-harris-electromagnet-4693935.jpg?v=1773594015"}],"url":"https:\/\/abcschoolsupplies.ie\/collections\/field-effects.oembed","provider":"ABC School Supplies ","version":"1.0","type":"link"}