When charge is distributed over a surface, we can use the surface charge density to describe the distribution. Consider a long cylindrical conductor with a surface charge density. Suppose the diameter of the conductor is2a. Determine the electric field outside the conductor.

1-E = /2a₀r

2-E = 2/a₀r

3-E = a/₀r

4-E = a/₀r

5-E = 2a/₀r