**Introduction**

The College Board releases a list of topics on the AP Physics Exam. In this study guide, I will be going over each one, including a potential problem that could come up.

**Electrostatics**

## Charge and Coulomb's Law

### Possible Problem

Three charges in a line. What's the force on the first one? When doing this, keep in mind that force is a vector, so focus on the direction.

## Electric Field and Electric Potential

## Gauss's Law

Other times, it is seen as $\int E \cdot da = \dfrac{q_{enc}}{\epsilon_0}$, but the first expression is sufficient for the AP.

## Fields and Potentials of Other Charge Distributions

I am fairly sure this is referring to a uniform electric field. This means instead of extending radially, the field is created by two parallel plates, and it is uniform inside.

# Conductors, Capacitors, Dielectrics

## Electrostatics with Conductors

A conductor is a material that allows the free flow of electrons. Electrostatic equilibrium means the charges are stable. It is important to know that a conductor in electrostatic equilibrium has **no electric field**. This is due to Gauss's Law. If there were an electric field, then there must be charge inside. Because there is an electric field and charge inside, then those charges will move, but that means it's not in electrostatic equilibrium.

## Capacitors

Capacitors store charge. There are three main types