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Q.

For point charges –Q, -q, 2q and 2Q are placed, one at each corner of the square. The relation between Q and q for which the potential at the centre of the square is zero is

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a

Q=−q

b

Q=−1q

c

Q=1q

d

Q=q

answer is A.

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Detailed Solution

Question Image

V0=14πε0−Qr+−qr+2qr+2Qr=0

Q + q = 0

Q = -q

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