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
  • A$pE\cos \theta $
  • B$pE\sin \theta $
  • C$pE(1 - \cos \theta )$
  • D$ - pE\cos \theta $
AIPMT 1994, Medium
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