An electric dipole of moment p is lying along a uniform electric field E . The work done in rotating the dipole by 90^ is:-

NEET 2006 Physics question

An electric dipole of moment is lying along a uniform electric field . The work done in rotating the dipole by is:-

Answer: (4)

The work done in rotating a dipole from angle to in a uniform field is . Here (lying along the field) and $θ_2

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Question ID VK-089577