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# Solution: The work done in rotating the electric dipole through 180°

#### Problem Statement: Electromagnetics

Work Problem Solving

Two charges +5 μC and −5 μC separated by 4 mm form an electric dipole. The dipole is placed in a uniform electric field of 4 × 10^5 N/C. The work done in rotating the electric dipole through 180°, if it starts from the positions of = 0 is

A. 4 mJ

B. 12 mJ

C. 16 mJ

D. 8 mJ

The work done in rotating the electric dipole through 180°, if it starts from the positions of = 0 is equal to 16 mJ.

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