What measures the flow of electrons in a conductor?

The flow of electrons in a conductor is specifically referred to as current, which is denoted by the symbol 'I'. Current measures the rate at which electric charge flows through a circuit and is typically expressed in amperes (A). This concept is foundational in electrical engineering and is crucial for understanding how electrical systems operate.

Current is directly linked to the movement of electrons; as electrons flow through a conductor, they create an electric current. The relationship between voltage, resistance, and current is described by Ohm's Law, highlighting the interaction of these concepts in electrical circuits. While voltage represents the potential difference that drives the flow of electrons, and power relates to the rate of energy transfer, it is the current that quantifies how many electrons are flowing. Therefore, the correct choice, current, accurately represents the measurement of electron flow in a conductor.