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Q.

A positive charge (+ q) is located at the centre of a circle as shown in the figure. W1 is the work done in taking a unit positive charge from A to B and W2 is the work done in taking the same charge from A to C. Then

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a

W1 = W2=0

b

W1 <W2

c

W1 > W2

d

W1 = W2

answer is D.

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Detailed Solution

Points A, B and C are at the same distance from charge + q; hence electrical potential is the same at these points, i.e. there is no potential difference between A, B and C. Hence W1 = W2 = 0.

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