question_answer

A closed coil is made of a wire of length L and a current i ampere is flowing in it. If the plane of coil is perpendicular to magnetic field B. The force on the coil is

A) zero                      

B)  iBL

C)  2iBL                      

D) \[[ML{{T}^{-2}}]\]

Correct Answer: A

Solution :

Closed loop is represented in figure, according to this L=0 Therefore, \[[M{{L}^{-1}}{{T}^{-2}}]\]