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MHT CET 2021 (20 Sep, Shift 1) · Electric Dipole

Electric Dipole question from MHT CET 2021 (20 Sep, Shift 1)

Q52MHT CET 2021 · 20 SEP · SHIFT 1Easy

Electric Dipole

An electric dipole having dipole moment $\mathrm{P} = \mathrm{q} \times 2\ell$ is placed in a uniform electric field ' $\mathrm{E}$ '. The dipole moment is along the direction of the field. The force acting on it and its potential energy are respectively

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Answer: (d)

In a uniform field, forces $+qE$ and $-qE$ cancel: net force $= 0$ .
$\vec{p}$ along $\vec{E}$ : $\theta = 0$ , $U = -pE$ , the minimum value.
So the answer is (d) zero and minimum.

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