Two large parallel sheets of charge are separated by a distance d , small compared to the size of the sheets. The distance d is small enough that the sheets can be treated as if they were infinite in extent. The charge per unit area on the sheets are +σ and -σ respectively. For this problem, we are considering the electric field and potential along the coordinate line x shown. The 0 of the coordinate is at the left sheet.

A. Select which graphs below could be appropriate as a graph of each of the following quantities as a function of x . If more than one answer works, give them all. If none works, write N.

(a) The electric field
(b) The electrostatic potential

Explain your reasoning.