What is meant by voltage in an electrical circuit?

Voltage refers to the pressure that pushes charged electrons through a circuit. It is a measure of the electric potential difference between two points in the circuit, essentially indicating how much energy each electron can potentially carry as it moves through the circuit. This pressure causes the flow of electric current, which is the movement of electrons. Understanding voltage is crucial because it determines how much current will flow in the presence of a certain amount of resistance, following Ohm's Law.

The other options reflect different electrical properties. For instance, the measurement of electrical current refers to the flow of electrons, while resistance is the opposition to that flow. Power consumption is related to the amount of work done or energy used over time in the circuit but does not directly describe the driving force behind that flow, which is what voltage represents.