What is the SI unit used to measure electrical power?

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Multiple Choice

What is the SI unit used to measure electrical power?

Explanation:
Power is the rate at which energy is transferred. In electrical circuits, this energy transfer happens at the rate P = V × I, where voltage is the driving force and current is the flow of charges. The SI unit for this rate is the watt, defined as one joule per second; since volts times amps equal joules per second, V × I gives power in watts. The other terms measure related quantities: voltage is potential difference, resistance measures how much a component resists current, and current is the flow of charge. So the watt is the appropriate unit for electrical power.

Power is the rate at which energy is transferred. In electrical circuits, this energy transfer happens at the rate P = V × I, where voltage is the driving force and current is the flow of charges. The SI unit for this rate is the watt, defined as one joule per second; since volts times amps equal joules per second, V × I gives power in watts. The other terms measure related quantities: voltage is potential difference, resistance measures how much a component resists current, and current is the flow of charge. So the watt is the appropriate unit for electrical power.

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