Electrolysis Practice Exam

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Which unit is used to measure the flow of electric current?

Watts
Volts
Amperes
Ohms

The correct answer is: Amperes

The flow of electric current is measured in Amperes, often abbreviated as "amps." This unit quantifies the amount of electric charge that passes through a conductor in a given period of time. Specifically, one ampere is defined as the flow of one coulomb of charge per second. Understanding the other units provides context for why Amperes is the correct choice. Watts measure power, which is the rate at which electrical energy is used or produced; volts measure electrical potential or voltage, indicating the force that pushes electric current through a circuit; and ohms measure resistance, quantifying how much the flow of current is impeded in a circuit. Each of these units relates to electric circuits and current, but only Amperes specifically measures the flow of electric current itself.