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  • Derive an expression for l work done in rotating an electric dipole a uniform electric field?​

Derive an expression for l work done in rotating an electric dipole a uniform electric field?​

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\vec{\varsigma }= \vec{P}\times \vec{E} 
\vec{\varsigma }= pE\sin \theta
where, \vec{\varsigma }= torque
             p= momentum
Now
work done dw= \varsigma \cdot d\theta
dw= PE\sin \theta d\theta
on integrating both side,we have
w=\int_{\theta 1}^{\theta 2}dw= \int_{\theta 1}^{\theta 2}PE\sin \theta d\theta
w= pE\left [ \cos \theta _{1}-\cos \theta _{2} \right ]

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Safeer PP

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