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Question

An electric dipole of dipole moment p is placed in a uniform electric field E. The maximum torque experienced by the dipole is

A
pE
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B
p/E
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C
E/p
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D
p.E
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Solution

The correct option is D pE
The torque due to the electric dipole is τ=p×E=pEsinθ
where θ, angle between the dipole and the electric field.
For maximum torque, sinθ=1
So, τmax=pE

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