Question

A charge 'q' is moved from a point A, above a dipole of dipole moment 'p', to a point B below the dipole in equatorial plane without acceleration. Find the work done in the process.

Answer 1

The charge is taken from point A to point B.

From the figure, we can conclude that

The potentials due to the dipole at A and B are equal.

We know,

Work done is given as

Work done,$W=q(V_B-V_A)=q\times 0=0$.

Hence the total work done is zero.