question_answer

A wire carrying a current i is placed in a uniform magnetic field in the form of the curve \[y=a\sin \,\left( \frac{\pi x}{L} \right)\,0\le x\le 2L.\] The force acting on the wire is

A)            \[\frac{iBL}{\pi }\]

B)            \[iBL\pi \]

C)            \[2iBL\]

D)             Zero