A Carnot engine is working between $127^{o} C$ and $27^{o} C$ . The increase in efficiency will be maximum when the temperature of

the source is increased by

50^{o} C

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the sink is decreased by

50^{o} C

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source is increased by

25^{o} C

and that of sink is decreased by

25^{o} C

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both source and sink are decreased by

25^{o} C

each

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Solution

The correct option is B the sink is decreased by $50^{o} C$
Efficiency is given by:
$η = 1 - \frac{T_{2}}{T_{1}}$
Initial efficiency is $= 1 - \frac{27 + 273}{127 + 273} = 0.25$
Considering all the four options,
$η_{m a x} = 1 - \frac{250}{400} = 0.375$
Which is option B.

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A Carnot engine is working between 127oC and 27oC. The increase in efficiency will be maximum when the temperature of

The correct option is B the sink is decreased by 50oCEfficiency is given by:η=1−T2T1Initial efficiency is =1−27+273127+273=0.25Considering all the four options,ηmax=1−250400=0.375Which is option B.

A Carnot engine is working between $127^{o} C$ and $27^{o} C$ . The increase in efficiency will be maximum when the temperature of

The correct option is B the sink is decreased by $50^{o} C$
Efficiency is given by:
$η = 1 - \frac{T_{2}}{T_{1}}$
Initial efficiency is $= 1 - \frac{27 + 273}{127 + 273} = 0.25$
Considering all the four options,
$η_{m a x} = 1 - \frac{250}{400} = 0.375$
Which is option B.