Question

What is the efficiency formula?

Answer 1

1. Efficiency can be defined as the percentage of the input energy that is converted into work (output).
2. If the input energy is $E$ and the work done is $W$, then the efficiency can be expressed by the formula, $\eta =\frac{W}{E}\times 100\%$.
3. The efficiency is calculated as a percentage.
4. If the output energy (work done) of a process is equal to the input energy, then the process is said to be $100\%$ efficient.