question_answer

Same as problem 43 except the coil A is made to rotate about a vertical axis. No current flows in B if A is at rest. The current in coil A when the current in B (at t = 0) is counter-clockwise and the coil A is as shown at this instant, t - 0, is:                                                            (NCERT EXEMPLAR)

A) constant current clockwise

B) varying current clockwise

C) varying current counter-clockwise

D) constant current counter-clockwise