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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