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JEE Main & Advanced Physics Electrostatics & Capacitance Question Bank Electric Dipole

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    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 [MP PET 1993]

    A)                    \[pE\cos \theta \]

    B)                                      \[pE\sin \theta \]

    C)                    \[pE(1-\cos \theta )\]

    D)                                      \[-pE\cos \theta \]

    Correct Answer: D

    Solution :

               Potential energy of dipole in electric field \[U=-PE\cos \theta \]; where q is the angle between electric field and dipole.


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