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An electric dipole of dipole moment p is...

An electric dipole of dipole moment p is placed in the position of stable equilibrium in uniform electric field of intensity E. this is rotated through an angle `theta` from the initial position . The potential energy of the electric dipole in the final position is

A

`pE cos theta`

B

`pE sin theta`

C

`pE (1- cos theta)`

D

`-pE cos theta`

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The correct Answer is:
D
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