Question

# The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is?

A
6.25%
B
26.8%
C
12.5%
D
20%

Solution

## The correct option is B $$26.8\%$$$$\eta_{heat engine} = 1 - \dfrac{Q_{c}}{Q_{h}} = 1 - \dfrac{T_{c}}{T_{h}} = 1 - \dfrac{273}{373} \times 100$$$$\eta = 26.80 %$$option 2 is correct answerPhysics

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