Question

Calculate the efficiency of an engine if the work input is 300. j and the work output is 100. j

Answer 1

efficiency is (output/input) x 100
the efficiency is 33.33%

Answer 2

Efficiency of an engine is 33.34 %

Step-by-step explanation:

It is given that,

Input work, W₁ = 300 Joules

Output work, W₂ = 100 Joules

We have to find the efficiency of the engine. The efficiency of engine is given by the ratio of output work to the input work. Mathematically, it is given by :

`\eta=(w_2)/(w_1)* 100`

`\eta=(100)/(300)* 100`

`\eta=33.34\%`

Hence, the efficiency of the engine is 33.34 %