Energy Efficiency

Front

What is energy efficiency?

Back

A comparison of how much energy is used to do work versus how much is lost or wasted to the environment.

Front

How is efficiency calculated?

Back

Efficiency = (Work Output / Work Input) × 100 %

Front

If a cyclist puts in 600 J of work and gets 140 J of useful work, what is the efficiency?

Back

Efficiency = (140 / 600) × 100 % = 23.3 %

Front

What is the maximum possible efficiency of any energy conversion?

Back

100% (but in reality, it is always less due to energy losses)