{"product_id":"united-scientific®-eddy-current-demonstrator-12-long","title":"United Scientific® Eddy Current Demonstrator, 12\" Long","description":"A simple but effective device for demonstrating Lenz's Law using eddy currents induced in the wall of a copper tube by a falling magnet. The demonstrator consists of a 12\" long copper tube and two apparently identical metal slugs with rubber end caps. One slug is plain steel and falls through the copper tube quickly. The other slug is a strong neodymium magnet that falls very slowly through the tube due to the braking effect of eddy currents. Includes activity guide.","brand":"United Scientific Supplies","offers":[{"title":"Default Title","offer_id":49962369417493,"sku":"USSEDYCR1","price":35.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0857\/4897\/3845\/files\/EDYCR1_20Eddy_20Current_20Demonstrator.jpg?v=1781073769","url":"https:\/\/unitedsupplycorp.com\/products\/united-scientific%c2%ae-eddy-current-demonstrator-12-long","provider":"United Supply Corp.","version":"1.0","type":"link"}