Q. A wire carrying a current $i$ is placed in a uniform magnetic field in the form of the curve $y = a\sin\left( \frac{\pi x}{L} \right),0 \leq x \leq 2L$. The force acting on the wire is
A) $\frac{iBL}{\pi}$
B) $iBL\pi$
C) $2iBL$
D) Zero
Explanation
(c) The given portion of the curved wire may be treated as a straight wire of length $2L$ which experience a magnetic force $F_{m} = Bi(2L)$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.