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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

`pEcostheta`

B

`pEsintheta`

C

`pE(1-costheta)`

D

`-pEcostheta`

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