Question
Answer the following in a word or two or in a sentence.
Write the formula for calculating the efficiency of a machine.
Write the formula for calculating the efficiency of a machine.
✓
Answer
$
\text { Efficiency }=\frac{\text { Output energy }}{\text { Input energy }}
$
The percentage value of efficiency of a machine is calculated as
$
\text { Efficiency }=\frac{\text { Output energy }}{\text { Input energy }} \times 100 \%
$
\text { Efficiency }=\frac{\text { Output energy }}{\text { Input energy }}
$
The percentage value of efficiency of a machine is calculated as
$
\text { Efficiency }=\frac{\text { Output energy }}{\text { Input energy }} \times 100 \%
$
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