Question

An electric dipole consist of point charges q1=+12nC and q2= -12nC placed 10.0 cm apart. Compute the electric potential energy.

Answer 1

The electrical potential energy

$$W=k\frac{q_1q_2}{r}\\ =9*10^9*\frac{12*10^{-9}*(-12*10^{-9})}{0.1}=-1.3*10^{-5}\:\rm J$$