A rigid circular loop has a radius of 0 20 m and is in the xy plane A clockwise current I is carried by the loop as shown The

Question

A rigid circular loop has a radius of 0 20 m and is in the xy plane A clockwise current I is carried by the loop as shown The magnitude of the magnetic moment of the loop is 0 75 A m A uniform external magnetic field B 0 20 T in the positive x direction is present An external torque changes the orientation of the loop from one of lowest potential energy to one of highest potential energy The work done by this external torque is closest to O 0 40 J O 0 30 J 0 50 J 0 20 J 0 20 m a b L B 0 20 T x

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