Which statement is NOT a correct expression for power in watts?

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 statement is NOT a correct expression for power in watts?

Explanation:
Power is the rate at which energy is transferred, and a watt represents one joule of energy transferred every second. In electrical terms, power can be written as P = V × I, so voltage times current gives power in watts. A kilowatt is just 1000 watts, so it’s also a valid way to express power. The statement that is not a correct expression for power in watts is one joule per minute. A joule per minute describes energy transfer over a minute, not per second. Since 1 J/min equals 1/60 J/s, it equals 1/60 watt, not a watt.

Power is the rate at which energy is transferred, and a watt represents one joule of energy transferred every second. In electrical terms, power can be written as P = V × I, so voltage times current gives power in watts. A kilowatt is just 1000 watts, so it’s also a valid way to express power.

The statement that is not a correct expression for power in watts is one joule per minute. A joule per minute describes energy transfer over a minute, not per second. Since 1 J/min equals 1/60 J/s, it equals 1/60 watt, not a watt.

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