Question

The unit of power is

• A. watt per second
• B. joule
• C. kilojoule
• D. watt

Answer 1

The correct option is D

watt

The explanation for the correct option:

The correct option is D. watt

1. Power is the rate of doing work.
2. The S.I. unit of power is the watt (W).
3. Power can also be expressed in terms of joule per second (J/s), which is equal to a watt (W).

The explanation for incorrect options:

A. watt per second

Watt per second is the unit of power per unit time.

B. joule

The S.I. unit of work and energy is the joule.

C. kilojoule

Work and energy are measured in kilojoules.

Thus option D is the correct answer, the unit of power is the watt.