A uniform magnetic field of 0.3 T is established along the positive Z-direction. A rectangular loop in XY plane of sides 10 cm and 5 cm carries a current of I = 12 A as shown. The torque on the loop is _____

Explanation

use `tau = IA xx B ` and `F = Il xx B`
(a) `1.8 xx 10^(-2)` N m along - y direction
(b) same as in (a)
( c) ` 1.8 x 10^(-2) N` m along -x direction
( d) `1.8 xx 10^(-2) N` m at an angle of `240^@` with the +x direction
(e ) zero
( f) zero
Force is zero in each case. Case (e) corresponds to stable, and case (f) corresponds to unstable equilibrium.