_A uniformly charged solid sphere with a radius of 0.4 m and net electric charge of 500 nC is rotating with angular speed of 6 rad/s. The axis of rotation is indicated by the dashed line. (D e I! e B '9 I ,'-->9 I The magnitude of the constant external magnetic eld has a magnitude of 15 mT. What is the magnitude of dipole contribution to the net torque (in pN m) exerted on the sphere due to its interaction with the external magnetic eld if 6 = 40