What is the electric field strength just outside the surface of a conducting sphere carrying surface charge density 1.4 μC/m2μC/m2?

Explanation:

Gauss's theorem states that the flux of the electric field through a closed surface is equal to the the charge enclosed by the surface divided by the vacuum permittivity:

The direction of the electric field () just outside of a conductor is parallel to its surface ():

Recall that the surface charge density is defined as:

Now, we get the electric field strength: