Question

The magnitude of the electric field on the surface of a sphere of radius $r$ having a uniform surface charge density $\sigma$ is

• A. $\sigma /{ϵ}_0$
• B. $\sigma /2{ϵ}_0$
• C. $\sigma /{ϵ}_{0}r$
• D. $\sigma /2{ϵ}_{0}r$

Answer 1

The correct option is A $\sigma /{ϵ}_0$

The magnitude of the electric field on the surface of radius $=r$

Charge density $=6$

Then, $E=\frac{6}{{ϵ}_0}$

The electric field is independent of the surface radius.