Question

A square loop, carrying a steady current $I$, is placed in horizontal plane near a long straight conductor carrying a steady current $I_1$ at a distance of $d$ from the conductor as shown in figure. The loop will experience :

• A. A net repulsive force away from the conductor
• B. A net torque acting upward perpendicular to the horizontal plane
• C. A net torque acting downward normal to the horizontal plane
• D. A net attractive force towards the conductor

Answer 1

The correct option is D A net attractive force towards the conductor

As the two adjacent wires carry current in the same direction therefore there must be the net attractive force on the loop, and the wire which is away from the straight wire also carries in the same direction so the force is attractive force, The perpendicular wire has no force on the straight wire. So net attractive force towards the conductor.