An electric dipole of moment $\vec p$ is kept in a uniform electric field $\vec E$. Angle between $\vec p$ and $\vec E$ is $30^o$. Calculate work done by field when angle is increased to $60^o.$
A$\frac{{pE}}{2}\left( {\sqrt 3 - 1} \right)$
B$\frac{{pE}}{2}\left( {1 - \sqrt 3 } \right)$
C$pE\left( {\sqrt 3 - \sqrt 2 } \right)$
D
zero
Medium
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B$\frac{{pE}}{2}\left( {1 - \sqrt 3 } \right)$
b $ \mathrm{W}_{\text {field }} =\mathrm{PE}\left(\cos \theta_{2}-\cos \theta_{1}\right)$
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