{"product_id":"united-scientific®-primary-secondary-coils","title":"United Scientific® Primary \u0026 Secondary Coils","description":"Superior version of the classic device for investigating electromagnetic induction. Primary and secondary coils are wound on robust molded formers fitted with shielded banana jacks. The plated iron core has a molded handle for accurate positioning in the coils. The primary coil has 175 turns of 18 AWG insulated copper wire (diameter 34mm, length 100mm, resistance 0.43 Ω, self-inductance ≈3.1mH). Secondary coil has three available windings with 500, 1000, and 1500 turns of 26 AWG insulated copper wire (diameter 52mm, length 102mm, resistances 11.5 Ω, 23.3 Ω, 35.7 Ω, self-inductances ≈ 490mH, 1.97H, 4.43H). Plated iron core is 19mm in diameter and 165mm long (including handle). Includes activity guide.","brand":"United Scientific Supplies","offers":[{"title":"Default Title","offer_id":49962305388821,"sku":"USSPSC001","price":89.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0857\/4897\/3845\/files\/PSC001_20Primary_20and_20Secondary_20Coils.jpg?v=1781071072","url":"https:\/\/unitedsupplycorp.com\/products\/united-scientific%c2%ae-primary-secondary-coils","provider":"United Supply Corp.","version":"1.0","type":"link"}