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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