Question

An electric dipole consists of two point charges \(+1\,\mu\text{C}\) and \(-1\,\mu\text{C}\), held 10 cm apart. It is subjected to a uniform electric field of \(100\,\text{N/C}\). Calculate the amount of work done in turning the dipole from its position of stable equilibrium to the position of unstable equilibrium, in the field.

Hint:

For rotation of a dipole from stable equilibrium \((0^\circ)\) to unstable equilibrium \((180^\circ)\), \[ W=2pE \] This shortcut directly gives the required work done.

Answer 1