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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

$V_{Centre} = \frac{σr}{ε_{0}} = \frac{(8 .85 \times 10^{- 8}) \times (10 \times 10^{- 2})}{8 .85 \times 10^{- 12}} = 10^{+ 3} V$

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