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Q.

Surface charge density of a sphere of a radius 10 cm is 8.85×10–8 C/m2. Potential at the centre of the sphere is

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a

442.5 V

b

885 V

c

1000 V

d

10–3 V

answer is A.

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Detailed Solution

VCentre =σrε0=8.85×10−8×10×10−28.85×10−12=10+3V

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