What is the unit of electric power?

Study for the NCEA Level 2 Electricity Exam. Prepare with flashcards and multiple-choice questions; each question has hints and explanations. Get ready for your exam!

The unit of electric power is the Watt. It quantifies the rate at which electrical energy is transferred or converted. In practical terms, one Watt is defined as one joule of energy per second. This means that if a device consumes one Watt of power, it uses one joule of energy every second it operates.

In circuits, power can be calculated using different formulas, one of which is P = IV, where P is power in Watts, I is current in Amperes, and V is voltage in Volts. This relationship illustrates how power in an electrical context depends on both the current flowing through a device and the voltage across it.

The other options refer to different electrical properties; the Volt is the unit of electric potential, the Ohm is the unit of electrical resistance, and the Ampere is the unit of electric current. Each of these is essential in their own right, but they pertain to different aspects of electricity rather than directly measuring power.

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