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

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

• A. One joule per second
• B. One joule per minute
• C. Volt × Ampere
• D. Kilowatt

Answer: (B)

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.