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The number of electrons to be put on a s...

The number of electrons to be put on a spherical conductor of radius `0.1m` to produce an electric field of `0.036N//C` just above its surface is

A

`2.7 xx10^5`

B

`2.6 xx10^5`

C

`2.5 xx10^5`

D

`2.4 xx10^5`

Text Solution

Verified by Experts

The correct Answer is:
C
`E=(Kq)/(r^2) =("Kne")/(r^2)`
`implies n = (Er^2)/(Ke) = (0.036 xx(0.1)^2)/(9 xx10^9 xx1.6 xx10^(-19)) = 2.5 xx10^5`
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