Question

An electric dipole when placed in a uniform electric field $E$ will have minimum potential energy, if the positive direction of dipole moment makes the following angle with $E$

• A. $\pi$
• B. $\pi/2$
• C. Zero
• D. $3\pi/2$

Answer 1

Answer: (C)

Zero

Answer 2

Potential energy = – pE cosθ

When θ = 0. Potential energy = – pE (minimum)