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

Explanation

Magnitude of the torque acting on an electric dipole of moment p in an electrostatic field `vecE` is given by `tau = pE sin theta`
Magnitude of the torque acting on a magnetic dipole of moment `vecM` in a magnetic field B is given by
`tau. = MB sin theta `
Since the motions of the two dipoles are identical, we have:
` tau = tau.`
`pE sin theta = MB sin theta `
` rArr pE = MB`
we know that , `E = cB`
` rArr pcB = MB`
`vecp = (vecM)/(c ) `