should not in second 12th question relatively current (positive charge) will move with speed 2v . ? Isn't as such positive charge as such electrons remains at rest? @Anmol_Agarwal @Unik-Wadhwani @Vivek_Pamnani @Anindya_Sikdar will they flow at v or 2v ?
Electrons move in direction opposite to current so man and electrons are moving in same direction with same velocity so relative velocity will be 0
I got that bro. Can u try another 12 that question which i posted @Siddhant_Mudholkar
See this https://www.quora.com/Is-work-done-by-magnetic-field-when-two-wires-carrying-current-attract-each-other-How-is-the-kinetic-energy-increasing-if-magnetic-field-does-no-work-Is-there-any-other-field-present-that-does-work