Q.

Four charges +3µC, -1µC, +5µC and -7µC are arranged on the circumference of a circle of radius 0.5 m. The potential at the centre is

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a

Zero

b

18×104V

c

-18×104V

d

288×103V

answer is A.

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Detailed Solution

V=14πε0∑Qr
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