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Asphere of radius 10 cm is given a charg...

Asphere of radius 10 cm is given a charge of `20 muC` on its surface. The surface charge density of sphere is

A

`3.18xx10^-4C/m^2`

B

`2xx10^-6C/m^2`

C

`3xx10^-9C/m^2`

D

`1.59xx10^-4C/m^2`

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