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Q.

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 θ from the initial position. The potential energy of electric dipole in the final position is

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a

−pE cos θ

b

pE sin θ

c

pE (1−cos θ)

d

pE cos θ

answer is D.

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Detailed Solution

Potential energy of dipole in electric field U=−PE cos θ; where θ is the angle between electric field and dipole.

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