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Charges +q and -q are placed at points A and B respectively which are a distance 2L apart, C is the midpoint between A

Charges +q and -q are placed at points A and B respectively which are a distance 2L apart, C is the midpoint between A and B. The work done in moving a charge +Q along the semicircle CRD is R (a) (b) (c) (d) qQ 2 L qQ qQ qQ 4L A C B D

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