Question

An electric dipole of dipole moment 8 × 10−5 Cm is rotated in uniform electric field from parallel to antiparallel position of dipole with respect to field. If value of field is 4 × 105 N/C, then change in potential energy of the dipole for the given rotation will be
1. 8 J
2.16 J
3.32 J
4.64 J
Correct answer is 64 J.
Please explain.
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Answer 1

Answer:

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