Which one of the following is the practical unit of power?
Correct answer: C. Horse power (hp)
- A. Watt (W)
- B. Kilowatt hour (kWh)
- C. Horse power (hp)
- D. Kilojoule (kJ)
Explanation
The practical unit of power, particularly in contexts like automotive and mechanical engineering, is horsepower (hp). Horsepower is used because it provides a relatable measure of engine power, such as when describing car engines. It is defined as 746 watts. While the watt (W) is the SI unit of power, it is not typically referred to as a 'practical' unit in these contexts. The kilowatt hour (kWh) and kilojoule (kJ) are units of energy, not power, making them incorrect choices for this question.
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