Which of the following are not units of power?

A. Watt

B. eV

C. Kilowatt hour

D. Joule

E. Calorie

Answer: B. eV

eV, also known as electron-volt, is the measure of the quantity of kinetic energy gained by an electron accelerating through an electric potential difference of one volt from rest through a vacuum. The SI unit of power is a watt, which equals one joule per second. Some other traditional measures however are adopted to serve as units of power. They include calories per hour, horsepower, kilowatt, joule per second, foot-pounds per minute, etc.

Physics

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