MHT CET 2023 Physics question
The work done in rotating a dipole placed parallel to the electric field through 180° is 'w'. So the work done in rotating it through 60° is ( cos 0° = 1, cos 60° = , cos 180° = )
Answer: (D)
Solution
The work done in rotating a dipole from the angle to is . Starting from the parallel position (), the work for a rotation through is . For : . For :
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