The expression for torque '$\vec{\tau}$' experienced by an electric dipole of dipole moment '$\vec{P}$' in an external uniform electric field '$\vec{E}$' is given by:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → $\vec{\tau}=\vec{P} \times \vec{E}$
The dipole moment is,
$\vec{\tau}=\vec{P} \times \vec{E}$