Derive the expression for the torque acting on an electric dipole, when it is held in a uniform electric field. Identify the orientation of the dipole in the electric field, in which it attains a stable equilibrium.
OR
Obtain the expression for the energy stored in a capacitor connected across a dc battery. Hence define the energy density of the capacitor.
[2020 | Delhi | Section - B | SET-1 SET-2 SET-3, Q.21 Q.27 Q.26]
