Electrostatics Question 290
Question: An electric dipole of moment $ p $ is placed in the position of stable equilibrium in uniform electric field of intensity $ E $ . It is rotated through an angle $ \theta $ from the initial position. The potential energy of electric dipole in the final position is [MP PET 1993]
Options:
A) $ pE\cos \theta $
B) $ pE\sin \theta $
C) $ pE(1-\cos \theta ) $
D) $ -pE\cos \theta $
Show Answer
Answer:
Correct Answer: D
Solution:
Potential energy of dipole in electric field $ U=-PE\cos \theta $ ; where q is the angle between electric field and dipole.
