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Question

A point charge is placed at the origin O. Work done in taking another point charge -Q from the point A(0, a) to another point B(a, 0) along the straight path AB is



A

Zero

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B

(qQ4πω01a2)2a

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C

(qQ4πω01a2)a2

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D

(qQ4πω01a2)2a

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Solution

The correct option is B

Zero


Since A and B are at equal potential so potential difference between A and B is zero. Hence W=q.ΔV=0


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