An electric field of 1000 V / m is applied to an electric dipole at angle of 4 5 ∘ . The value of electric dipole moment is 1 0 − 29 C ⋅ m . What is the potential energy of the electric dipole?

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Potential energy of a dipole is given by U = − P E = − PE cos θ [Where θ = angle between dipole and perpendicular to the field = − ( 1 0 − 29 ) ( 1 0 3 ) cos 4 5 ∘ = − 0.707 × 1 0 − 26 J = − 7 × 1 0 − 27 J

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