Question

State two factors on which power spent by a source depends. Explain your answer with examples.

Answer 1

A source's use of power depends on two things:

1. The amount of work done by the source, and
2. The time taken by the source to do the said work.

Example: Should a coolie A take one minute to raise a load to a bus roof, and another coolie B take two minutes to do the same, Both coolies accomplish the same amount of work; however, because coolie A works more quickly, the power expended by him is double that of coolie B.