If work done by the heat engine is $600 J$ and heat absorbed by the working substance is $800 J$ , the efficiency of the heat engine is

133 %

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75 %

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25 %

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33 %

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Solution

The correct option is B $75 %$
$W = 600 J$
Heat absorbed by the working substance, $Q_{1} = 800 J$
Efficiency of heat engine is given as,
$η = \frac{Work done}{Heat supplied} \times 100$
$∴ η = \frac{W}{Q_{1}} \times 100 = \frac{600}{800} \times 100 = 75 %$

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If work done by the heat engine is 600 J and heat absorbed by the working substance is 800 J, the efficiency of the heat engine is

The correct option is B 75%W=600 J Heat absorbed by the working substance, Q1=800 J Efficiency of heat engine is given as, η=Work doneHeat supplied×100 ∴η=WQ1×100=600800×100=75%

If work done by the heat engine is $600 J$ and heat absorbed by the working substance is $800 J$ , the efficiency of the heat engine is

The correct option is B $75 %$
$W = 600 J$
Heat absorbed by the working substance, $Q_{1} = 800 J$
Efficiency of heat engine is given as,
$η = \frac{Work done}{Heat supplied} \times 100$
$∴ η = \frac{W}{Q_{1}} \times 100 = \frac{600}{800} \times 100 = 75 %$