Voltage

Definition

Voltage, also known as electric potential difference, is the measure of potential energy between two points in an electric field. It is measured in volts (V) and drives electric current through a circuit.

5 Must Know Facts For Your Next Test

1. Voltage is calculated using the formula $V = IR$, where $I$ is current and $R$ is resistance.
2. In a series circuit, the total voltage is the sum of the voltages across each component.
3. In a parallel circuit, the voltage across each component is equal to the total voltage.
4. Voltage can be measured using a voltmeter connected across two points in a circuit.
5. The unit of voltage, the volt (V), is defined as one joule per coulomb.

Review Questions

Related terms

Current:

The flow of electric charge through a conductor, measured in amperes (A).

Resistance:

A material's tendency to resist the flow of charge (current), measured in ohms ($\Omega$).

Electric Field:

A field around charged particles that exerts force on other charged particles within the field.