Electrostatics Question 287

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 $ [CPMT 1981; MP PMT 1987]

Options:

A) $ \pi $

B) $ \pi /2 $

C) Zero

D) $ 3\pi /2 $

Show Answer

Answer:

Correct Answer: C

Solution:

Potential energy $ =~pE\text{cos}\theta $

When $ \theta =0 $ .

Potential energy = - pE (minimum)



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