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Calculate the amount of work done in rotating a dipole, of dipole moment 3 × 10–8 Cm, from its position of stable equilibrium to the position of unstable equilibrium, in a uniform electric field of intensity 104 N/C.

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P = 3 x 10-8 Cm; E = 104 N/C

At stable equilibrium (θ1) = 0°

At unstable equilaibrium (θ2) = 180°

Work done in a rotating dipole is given by:

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