Recent content by kvmadan

  1. K

    High School How to build a stonger Electro-Magnet

    i went through the discussion...i'm making an electromagnet with a cylindrical iron core(2.5 cm dia, 8 cm height)... i used a 12v 1.3ah battery and it got drained in no time ! 20 seconds i guess... I'm thinking of buying a 12v 10a battery ... is it necessary? i want the electromagnet to work for...