A conducting circular loop of radius `r` carries a constant current `i`. It is placed in a uniform magnetic field `B` such that `B` is perpendicular to the plane of loop. What is the magnetic force acting on the loop?

Options

A. `ir vec(B)`
B. `2pi ri vec(B)`
C. zero
D. `pi ri vec(B)`

Answer

C

Explanation

Net force on a current carrying loop is always zero, if it is placed in an uniform magnetic field.