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Standard XII

Physics

1st Law of Thermodynamics

If the effici...

Question

If the efficiency of an engine is $50 %$ and its work output is $500 J$ . Find input?

500 J

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100 J

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1000 J

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250 J

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Solution

The correct option is C $1000 J$
$η = 1 - \frac{work out put}{heat input}$
$\frac{1}{2} = \frac{500}{Heat input}$
Heat input $= 1000$

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If the efficiency of an engine is 50% and its work output is 500J. Find input?

The correct option is C 1000Jη=1−work out putheat input12=500Heat inputHeat input =1000

If the efficiency of an engine is $50 %$ and its work output is $500 J$ . Find input?

The correct option is C $1000 J$
$η = 1 - \frac{work out put}{heat input}$
$\frac{1}{2} = \frac{500}{Heat input}$
Heat input $= 1000$