An electric dipole of moment p is placed in a position of stable equilibrium in a uniform electric field of intensity E.

What amount of work will be done if the dipole is rotated through an angle θ from its initial position?

Dear Student,

Work Done by an electric dipole

U=-p.Estable equilibrium is the state where the dipole moment is parallel to the electric fieldi.e θ=0or P.E initially=-pEcos0 or U=-pE ( min )When its rotated by angle θU=-pEcosθThus work done= Change in P.Eor, W=-pEcosθ-1


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