An infinite nonconducting sheet with a uniform surface charge density sets up parallel equipotential surfaces. Any pair of surfaces differing by 25.0 V are separated by 8.80 mm. (a) What is the magnitude of the surface charge density? (b) If an electron is released near the sheet, does it tend to move from higher to lower potential or vice versa ?

Explanation

To solve the problem step by step, we will break it down into two parts as given in the question.

### Part (a): Finding the Magnitude of the Surface Charge Density

1. **Understanding the Electric Field and Potential Difference**:
The electric field (E) between two equipotential surfaces is given by the formula:
\[
E = -\frac{dV}{dx}
...