The workdone in rotating an electric dipole of moment P in an electric

1.	The workdone in rotating an electric dipole of moment P in an electric field E through an angle 0 from the direction of the field is(a) pE (1 – cos θ) (b) 2pE (c) zero (d) -pE cos θ
Answer» (a) pE (1 – cos θ) W = pE(cos θ₀ – cos θ) [θ₀ = cos 0, cos 0 = 1] W = pE(1 – cos θ)

The workdone in rotating an electric dipole of moment P in an electric field E through an angle 0 from the direction of the field is(a) pE (1 – cos θ) (b) 2pE (c) zero (d) -pE cos θ

Answer»

(a) pE (1 – cos θ)

W = pE(cos θ₀ – cos θ)

[θ₀ = cos 0, cos 0 = 1]

W = pE(1 – cos θ)

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The workdone in rotating an electric dipole of moment P in an electric field E through an angle 0 from the direction of the field is(a) pE (1 – cos θ) (b) 2pE (c) zero (d) -pE cos θ

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