Question

Which of these is a unit of power and which is a unit of energy - a watt, a kilowatt-hour?

A) Watt is power; Kilowatt-hour is energy
B) Watt is energy; Kilowatt-hour is power
C) Both are units of power
D) Both are units of energy

Answer 1

The watt is a unit of power and the kilowatt-hour is a unit of energy.

Step-by-step explanation:

The SI unit for electric power is the watt and the SI unit for electric energy is the joule. Another common unit for electric energy, used by power companies, is the kilowatt-hour (kWh). The kilowatt-hour is a kilowatt times an hour, so it represents power multiplied by time, which is energy. Therefore, the correct answer is A) Watt is power; Kilowatt-hour is energy.