what is the work done in rotating the dipole in electric field from most stable electric configuration to its most unstable configuration?

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Solution

Potential energy of dipole is the energy possessed by the dipole by virtue of its particular position in the electric field.
Total work done in rotating the dipole from orientation θ₁ and θ₂ is stored in the form of potential energy and is given by :-
W = -pE (cosθ₂_-cosθ₁)
Where θ₁ is the angle at which dipole is in stable equilibrium = 0⁰
and θ₂ is the angle at which dipole is in unstable equilibrium = 180⁰

Hence, work done , W = 2pE .

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