Question : A square loop of sides 5 cm carrying a current of 0.2 A in the clockwise direction is placed at a distance of 10 cm from an infinitely long wire carrying a current of 1 A as shown. Will there be any torque acting on the loop? Give reason to support your answer.
Doubt by Ananya
Solution :
Let F1 be the force of attraction between PQ and AB
and F2 be the force of repulsion between PQ and DC
Both the forces F1 & F2 are not equal in magnitude because the distance between PQ-AB and PQ-DC are not same. Moreover the Forces F1 and F2 are collinear but we know in order to form a couple both the force must be non-collinear so they will not going to act a torque on the loop.
