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)
