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An electric dipole of moment p is palced...

An electric dipole of moment `p` is palced in the positive 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

A

`-`pE cos `theta`

B

pE `(1 - cos theta)`

C

pE cos `theta`

D

pE sin `theta`

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The correct Answer is:
A
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