A heat engine has an efficiency. Temperature of source and sink are each decreased by 100K. Then the efficiency of the engine. a) increases b) decreases c) remain constant
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Efficiency of heat engine,
n=1−
T
1
T
2
=
T
1
T
1
−T
2
. . . . . .(1)
According to question,
T
1
→T
1
−100
T
2
→T
2
−100
New efficiency, n
′
=1−
T
1
−100
T
2
−100
n
′
=
T
1
−100
T
1
−T
2
The efficiency of the engine is increasese
The correct option is A.
n=1−
T
1
T
2
=
T
1
T
1
−T
2
. . . . . .(1)
According to question,
T
1
→T
1
−100
T
2
→T
2
−100
New efficiency, n
′
=1−
T
1
−100
T
2
−100
n
′
=
T
1
−100
T
1
−T
2
The efficiency of the engine is increasese
The correct option is A.
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