Which of the following is NOT a unit of power?

Get ready for the NCCER Introduction to Electrical Circuits exam. Study with multiple choice questions, each question comes with hints and explanations. Ace your exam with confidence!

Multiple Choice

Which of the following is NOT a unit of power?

Explanation:
Power is the rate at which energy is transferred or work is done. The watt is the standard unit of power, defined as one joule per second. A horsepower is another unit of power used for engines and machines. Joule per second is simply another way to write a watt, since 1 W = 1 J/s. Coulomb, on the other hand, is the unit of electric charge; it measures how much charge, not how quickly energy is transferred, and current would be charge per time (coulombs per second) rather than power. So the one that is not a unit of power is Coulomb.

Power is the rate at which energy is transferred or work is done. The watt is the standard unit of power, defined as one joule per second. A horsepower is another unit of power used for engines and machines. Joule per second is simply another way to write a watt, since 1 W = 1 J/s. Coulomb, on the other hand, is the unit of electric charge; it measures how much charge, not how quickly energy is transferred, and current would be charge per time (coulombs per second) rather than power. So the one that is not a unit of power is Coulomb.

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