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Physics
Physics
Problem
Which one of the following expressions gives the efficiency
η
\eta
η
of an ideal heat engine working between a hot reservoir at absolute temperature
T
H
T_H
T
H
and a cold reservoir at
T
C
T_C
T
C
? a)
η
=
1
−
T
H
T
C
\eta=1-\dfrac{T_H}{T_C}
η
=
1
−
T
C
T
H
b)
η
=
T
H
−
T
C
T
H
+
T
C
\eta=\dfrac{T_H-T_C}{T_H+T_C}
η
=
T
H
+
T
C
T
H
−
T
C
c)
η
=
1
−
T
C
T
H
\eta=1-\dfrac{T_C}{T_H}
η
=
1
−
T
H
T
C
d)
η
=
T
C
T
H
\eta=\dfrac{T_C}{T_H}
η
=
T
H
T
C
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