question_answer

A rectangular coil \[20\,cm\times 20\,cm\] has 100 turns and carries a current of 1 A. It is placed in a uniform magnetic field       B =0.5 T with the direction of magnetic field parallel to the plane of the coil. The magnitude of the torque required to hold this coil in this position is                                                             [MP PMT 1997]

A)            Zero                                         

B)            200 N-m

C)            2 N-m                                      

D)            10 N-m