question_answer 43)

    Suppose we want to verify the analogy between electrostatic and magnetostatic by an explicit experiment. Consider the motion of (i) electric dipole  in an electrostatic field  and (ii) magnetic dipole  in a magnetic field . Write down a set of conditions on  so that the two motions are verified to be identical. (Assume identical initial conditions).

Answer:

                  Let  be the angle between  and  . Torque on electric dipole of moment  in electric field. Let  be the angle between  and . Torque on magnetic dipole moment  in magnetic field  , . Two motions will be identical if  or But    or .