Q. A rectangular loop carrying a current $i$ is placed in a uniform magnetic field $B$. The area enclosed by the loop is $A$. If there are $n$ turns in the loop, the torque acting on the loop is given by
A) $ni\ \overrightarrow{A} \times \overrightarrow{B}$
B) $ni\ \overrightarrow{A} \bullet \overrightarrow{B} \bullet$
C) $\frac{1}{n}\left( i\overrightarrow{A} \times \overrightarrow{B} \right)$
D) $\frac{1}{n}\left( i\overrightarrow{A} \bullet \overrightarrow{B} \right)$
Explanation
The correct answer is Option A: $ni\ \overrightarrow{A} \times \overrightarrow{B}$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.