Answer to Question #319993 in Electricity and Magnetism for carms

Question

3. How many excess electrons must be added to an isolated spherical conductor 0.100 meters in diameter to produce an electric field of 1800 N/C just outside the surface?

Answer 1

Answer

No of electrons added to sphere

$N=\frac{ER^2}{Ke}\\=\frac{1800*0.05*0.05}{9*10^9*1.6*10^{-19}}\\=31*10^6$