A dipole of electric dipole moment $p$ is placed is a uniform electric field of strength $E$. If $

Question

A dipole of electric dipole moment $p$ is placed is a uniform electric field of strength $E$. If $	heta$ is the angle between positive directions of P and E , then the potential energy of the electric dipole is largest when $	heta$ is\

Professor PC Thomas Classes · Answer

The potential energy of an electric dipole in a uniform electric field is\ $\mathrm{U}=-\overrightarrow{\mathrm{p}} . \overrightarrow{\mathrm{E}}$\ $\mathrm{U}=-\mathrm{pE} \cos 	heta$\ For U to maximum\ $\cos 	heta=-1 \Rightarrow 	heta=\pi$\