A point charge causes an elelctric flux of `-1.0 xx10^(3) Nm^(2) /C` to pass through a spherical gaussioan of 10.0 cm radius centred on the charge (a) if the radius of the gaussian surface wrere doubled how much flux would pas through the surface (b) what is the value of the point charge

Explanation

(a) Even after making radius of Gaussian surface doubled, amount of electric flux passing through it, will not change because the net charge enclosed by it remains same.
(b) According to Gauss.s law,
`phi = q/epsilon_(0)`
`therefore -1 xx 10^(3) = q/(8.85 xx 10^(-12))`
`therefore q = -8.85 xx 10^(-9)` C