question_answer 24)

    A metal plate is getting heated. It can be because (a) a direct current is passing through the plate (b) it is placed in a time varying magnetic field (c) it is placed in a space varying magnetic field, but does not vary with time (d) a current (either direct or alternating) is passing through the plate

Answer:

     (a,b,d)When a metal plate is getting heated, it may be due to the passage of direct current; alternating current or even induced current through the plate. As time varying magnetic field produces induced current in the plate, therefore, choices (a), (b), (d) are correct.