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Q.

Surface charge density of a sphere of a radius 20cm is 8.85 x 10-8 C/m2. The potential at the centre of the sphere is ε0=8.85×1012C2/Nm2

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a

2000V

b

1000V

c

885V

d

442.5V

answer is B.

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Detailed Solution

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V=σRε0

V=8.85×10-8×0.28.85×10-12=2000 V

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