​​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.

Dear Student,

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

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