A current loop of arbitrary shape lien in a uniform magnetic field B. show that the net magnetic force acting on the loop is zero.

Explanation

F_1 = Force on AD = iLB inward ,
F_2 = Force on BC = iLB inward,
They cancel each other ,
F_3 = force on CD = iLB inward,
F_4 = Force on AB = iLB inward ,
They also cancel each other. So , the net force on the body is 0.