What is another term often used interchangeably with "potential difference"?

The term "potential difference" refers to the difference in electric potential between two points in a circuit, which is essential for understanding how electrical energy moves through that circuit. The term "electromotive force" (EMF) is often used interchangeably with "potential difference" because both represent a measure of energy per unit charge available to drive the flow of electric charge in a circuit.

Electromotive force describes not only the potential difference when a circuit is closed but also indicates the energy supplied by a source, such as a battery or generator, to move charges through the circuit. While potential difference may exist even without a current flowing, EMF inherently implies the capability to drive a current when a circuit is complete. Therefore, using "electromotive force" as a synonym for "potential difference" is appropriate because they convey aspects of how electrical energy is transmitted in circuits.

The other options do not convey the same concept; power relates to the rate at which energy is consumed or produced, current refers to the flow of electric charge, and resistance is a measure of how much a material opposes the flow of electric current. These terms represent different principles in electrical theory and do not function as substitutes for potential difference.