Which unit is the unit of power?

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Study for the DC Theory Exam. Utilize flashcards and multiple choice questions; each question comes with explanations. Get ready for your test!

Multiple Choice

Which unit is the unit of power?

Explanation:
Power is the rate at which energy is transferred. The watt is the unit for power, defined as one joule per second. In electrical systems, power can be calculated as P = V × I, so one watt equals one volt times one ampere. The other units measure different things: ampere is current, volt is electric potential difference, and ohm is resistance. So the watt is the unit that measures power.

Power is the rate at which energy is transferred. The watt is the unit for power, defined as one joule per second. In electrical systems, power can be calculated as P = V × I, so one watt equals one volt times one ampere. The other units measure different things: ampere is current, volt is electric potential difference, and ohm is resistance. So the watt is the unit that measures power.

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