Question

A Carnot engine works between 600 K and 300
K. In each cycle of operation, the engine draws
1000 J of heat energy from the source. The
efficiency of the engine is
a) 50%
b) 70%
c) 20%
d) 80%​

Answer 1

Answer:

a) 50%

Efficiency of heat engine(η) is:

η=(1−

T

1

T

2

)×100% where T

1

is the temp of the source and T

2

is the temp of the sink.

∴η=1−

600

300

×100=

2

1

×100=50%