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Multiple Choice

What is a unit of electrical power?

Power in an electrical circuit is the rate at which energy is transferred or consumed. The unit for this power in the SI system is the watt, defined as one joule per second. In practical terms, electrical power can be found by multiplying voltage by current: P = V × I. That means the unit for power is volts times amps, which is watts. Volt measures potential difference (the “push” that drives current), amp measures the flow of electricity, and ohm measures resistance. So the watt is the unit that directly describes how much electrical energy is being used or produced per second. For example, a device governed by P = V × I demonstrates how a given voltage and current translate into a specific power in watts.

Power in an electrical circuit is the rate at which energy is transferred or consumed. The unit for this power in the SI system is the watt, defined as one joule per second. In practical terms, electrical power can be found by multiplying voltage by current: P = V × I. That means the unit for power is volts times amps, which is watts. Volt measures potential difference (the “push” that drives current), amp measures the flow of electricity, and ohm measures resistance. So the watt is the unit that directly describes how much electrical energy is being used or produced per second. For example, a device governed by P = V × I demonstrates how a given voltage and current translate into a specific power in watts.