that resistance equals the ratio of potential to current, and the respective units of ohm, volt, and ampere are used universally for expressing electrical quantities. Energy power consumption is ...

An electric current can flow in ... Potential difference close potential difference (V)The amount of energy transferred by each unit of charge passing between two points of a circuit.

is a measure of the electrical potential energy per unit charge in an electrical circuit. It is the force that drives the flow of electric charge in a circuit, and is expressed in volts (V).