Q.
A current carrying square loop is placed near an infinitely long current carrying wire as shown in figure The torque acting on the loop is
A) $\frac{\mu_{0}}{2\pi}\ i_{1}i_{2}r$
B) $\frac{\mu_{0}}{2\pi}\ i_{1}i_{2}\log_{e}2$
C) $\frac{\mu_{0}}{2\pi}\frac{i_{1}i_{2}r}{2}$
D) zero
Explanation
(d) The force acting on the loop $PQRS$ due to current $i_{1}$ through the long wire are acting in the plane of loop. Due to which the torque on loop is zero.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.