A point charge causes an electric flux of `-1.0 xx 10^(3) Nm^(2)//C` to pass through a spherical Gaussian surface of 10.0 cm radius centred on the charge.
a. If the radius of the Gaussion surface were doubled, how much flux would passes through the surface?
b. What is the value of the point charge?

Explanation

a. Flux does not change since the total charge q enclosed by the surface does not change
b. `phi=q/epsi_(0), q=epsi_(0) phi=8.85 xx 10^(-12) xx -1 xx 10^(3) =-8.85 xx 10^(-9)C`