Q. An electric dipole of the dipole moment p is placed in a uniform electric field E. The maximum torque experienced by the dipole is
A) $pE\ $
B) $\frac{P}{E}$
C) $\frac{E}{P}$
D) p.E
Explanation
(a) Torque of an electric dipole
$\tau = pE\sin\theta$
Torque is maximum when dipole is perpendicular to the field.
Hence,
$\tau_{\max\ } = pE\ $
$(\theta = 90{^\circ})$
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Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.