Which of the following graphs shows the correct variation in magnitude of torque on an electric dipole…
Which of the following graphs shows the correct variation in magnitude of torque on an electric dipole rotated in a uniform electric field from stable equillibrium to unstable equillibrium?
Solution
Torque on an electric dipole varies linearly from maximum at stable equilibrium to zero at unstable equilibrium, as it aligns with the electric field. Beyond unstable equilibrium, torque reverses direction, increasing in magnitude to oppose rotation, reaching maximum again.
