When loop is placed in the magnetic field then magnetic moment of coil τ=NiBAsinθ τmax=NiBA
Force
→
F
1 and
→
F
2, which are acting on coil, are equal in magnitude but opposite in direction Force
→
F
3 and
→
F
4 are equal in magnitude but opposite in direction, create magnetic moment. In this way force F acting on one side of loop and force −F acting on remaining side of loop.