Q106 / 180 · NEET 2018 · Physics

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

A
$6.25 %$
B
$20 %$
Correct answer
C
$26.8 %$
D
$12.5 %$

Solution

efficiency of ideal heat engine,

η = 1 - \frac{T_{2}}{T_{1}}

T_{2} :

temperature of sink

T_{1} :

temperature of source

Efficiency in Percentage, η = \frac{T_{1} - T_{2}}{T_{1}} \times 100

T_{1} = 373, T_{2} = 273

η = \frac{100}{373} \times 100 = 26.8 %

Hence, the correct answer is option: 'C'.

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