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Question: Answered & Verified by Expert
A current carrying square loop is placed near a straight infinitely long current carrying wire as shown in the figure. The torque acting on the loop is

PhysicsMagnetic Effects of CurrentAP EAMCETAP EAMCET 2018 (23 Apr Shift 1)
Options:
  • A $\frac{\mu_0}{2 \pi} \frac{i_1 i_2 l}{a b}$
  • B $\frac{\mu_0}{2 \pi} \frac{i_1 i_2 l}{a(a+b)}$
  • C $\frac{\mu_0}{2 \pi} \frac{i_1 i_2 l(b-a)}{a b}$
  • D 0
Solution:
1147 Upvotes Verified Answer
The correct answer is: 0
The forces acting on the sides of the square due to current $i$, all lie in the planes of the coil. Therefore, there is no net torque.

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