A uniformly charged conducting sphere of 2.4 m dimeter has a surface charge density of `80.0 mu C//m^(2)`. Find the charge on the sphere.

Explanation

Given `D=2.4 m, r=D/2=1.2 m`
`sigma =80 mu c//m^(2) =80xx10^(-6) C//m^(2)`
`sigma =q/(4pi r^(2)) implies q=sigma 4 pi r^(2)`
`implies q=80xx10^(-6) xx4xx3.14xx1.2xx1.2`
`:. q=1.45xx10^(-3) C`