Physics · Electrostatics

JEE Main 2025 — 29 January, Evening Shift — Question 19

An electric dipole is placed at a distance of 2 cm from an infinite plane sheet having positive charge

density $\sigma_{0}$ . Choose the correct option from the following.

Option A:
Torque on dipole is zero and net force is directed away from the sheet.
Option B:
Torque on dipole is zero and net force acts towards the sheet.
Option C:
Potential energy of dipole is minimum and torque is zero.
Correct
Option D:
Potential energy and torque both are maximum

Answer: C

Here $\mathrm{E}=\frac{\sigma}{2 \epsilon_{0}}, \vec{\tau}=\overrightarrow{\mathrm{P}} \times \overrightarrow{\mathrm{E}}$ $\vec{\tau}=0$

$\mathrm{U}=-\overrightarrow{\mathrm{P}} \cdot \overrightarrow{\mathrm{E}} \quad \mathrm{U} \rightarrow$ minimum

Answer key and solution verified before publishing.

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