Question

An AC Power adapter operates at 28.6 W.s. The output from the adapter is 1.04 W.s. What is its efficiency?

Answer 1

Explanation:

Efficiency is the ability to avoid wasting materials, energy, efforts, money, and time in doing something or in producing a desired result. In a more general sense, it is the ability to do things well, successfully, and without waste. "Efficiency is thus not a goal in itself.