A dipole of dipole moment is rotated inside a uniform electric field from its stable equilibrium position to unstable equilibrium position slowly. Then work done by external agent is?
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A dipole of dipole moment is rotated inside a uniform electric field from its stable equilibrium position to unstable equilibrium position slowly. Then work done by external agent is?
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Answer:
stable equilibrium the angle between p and E , θ₁ = 0°
For unstable equilibrium,θ₂ = 180°
Work done in rotating the dipole from angle θ₁ to θ₂
W = pE(cosθ₁-cosθ₂) = pE(cos0°-cos180°)
= 2pE.
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