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Physics · Electrostatic Potential
हिन्दीAn electric dipole of dipole moment \( p \) is placed in a uniform electric field \( \mathbf{E} \). If the dipole is rotated from an angle \( \theta = 0^\circ \) to \( \theta = 180^\circ \), the work done by the external agent is:
Correct answer · Option 4
\( 2pE \)
Explanation
Work done \( W = U_f - U_i = (-pE \cos 180^\circ) - (-pE \cos 0^\circ) = pE - (-pE) = 2pE \).
