# SI unit of Power is

Electrical Engineering MCQ Question with brief explanatory answer and explanation on the statement “SI Unit of Power is.” Understand what is electrical power and what is its SI unit in this MCQ post.

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SI unit of Power is:

1. volts
2. amps
3. ohms
4. watts

Correct answer: 4. watts

Explanation: The correct answer is watts.

Power is the rate at which work is done or energy is transferred or transformed. It is a fundamental concept in physics and engineering. The SI unit of power is the watt (W), named after James Watt, the Scottish engineer who significantly contributed to the steam engine’s development.

One watt is equal to one joule of energy per second. It is the amount of power required to perform work at a rate of one joule per second. In other words, if a device has a power rating of 1 watt, it means it can transfer or transform energy at a rate of 1 joule per second.

Volts, amps, and ohms are units used in the context of electrical quantities but are not the units of power. Volts (V) represent electric potential or voltage, amps (A) represent electric current, and ohms (Ω) represent electrical resistance. These units are used in Ohm’s Law and other electrical formulas, but power is specifically measured in watts.