An electric dipole of moment `vec(P)` is lying along a uniform electric field `vec(E )`. The work done in rotating the dipole by `90^(@)` is:A. `sqrt2`pEB. `pE/2`C. 2pED. p E

An electric dipole of moment `vec(P)` is lying along a uniform electri

1.	An electric dipole of moment `vec(P)` is lying along a uniform electric field `vec(E )`. The work done in rotating the dipole by `90^(@)` is:A. `sqrt2`pEB. `pE/2`C. 2pED. p E
Answer» Correct Answer - D Work done in rotating a diole from `0_(1) to 0_(2)` is `W=pE(cos0_(1)-cos 0_(2))` Here `0_(1)=0^(@) and 0_(2)=90^(@) therefore W=pE`

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An electric dipole of moment `vec(P)` is lying along a uniform electric field `vec(E )`. The work done in rotating the dipole by `90^(@)` is:A. `sqrt2`pEB. `pE/2`C. 2pED. p E

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