A circular loop of radius R carries a currrent i1, another loop of radius (r R) - Physics - Magnetism and Matter

Question

​​A circular loop of radius R carries a currrent i1,
another loop of radius (r<<R) carries a current i2 and is
placed at the center of the larger loop The planes of the two
circles are at right angles to each other Find the torque acting on
the smaller loop

Shobhit Mittal · Accepted Answer

Dear Student,

magnetic field at the center B=μ0i12Rtorque on loop =magnetic moment ×B⇀=πr2i2*μ0i12Rsin90=μ0i1πr2i22R  this will be torque 
Regards

​​A circular loop of radius R carries a currrent i1, another loop of radius (r<<R) carries a current i2 and is placed at the center of the larger loop. The planes of the two circles are at right angles to each other . Find the torque acting on the smaller loop.

A circular loop of radius R carries a currrent i1, another loop of radius (r<<R) carries a current i2 and is placed at the center of the larger loop. The planes of the two circles are at right angles to each other . Find the torque acting on the smaller loop.