Question

Write an expression for calculating the efficiency of a machine.

Answer 1

Efficiency of a machine:

1. The ratio of work performed by a machine or process to total energy spent or heat consumed is known as efficiency $\left(\eta \right)$.
2. A machine's efficiency measures how efficiently its input energy is turned into usable output energy or work.
3. So, the expression for calculating the efficiency of a machine is $\left(\mathrm{Efficiency}\left(\eta \right)=\frac{\mathrm{Output}\mathrm{energy}}{\mathrm{Input}\mathrm{energy}}\right)$.