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The charge density on the surface of a c...

The charge density on the surface of a conducting sphere is `64xx10^(-7)C//m^(2)` and the electric intensity at a distance of 2 m from the centre of the sphere is `4pixx10^(4)N//C`. The radius of the sphere is

A

0.83 m

B

0.4 m

C

0.6 m

D

0.38 m

Text Solution

Verified by Experts

The correct Answer is:
A
`R^(2)=(Ein_(0)kr^(2))/sigma=(4pixx10^(4)xx8.85xx10^(-12)xx4)/(64xx10^(-7))`
`therefore" "R=0.83m`
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