Thermodynamics - Result Question 36

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

======= ####38. The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is

3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed:content/english/neet-pyq-chapterwise/physics/thermodynamics/thermodynamics—result-question-36.md (a) $26.8 %$

(c) $12.5 %$

(b) $20 %$

(d) $6.25 %$

[2018]

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Answer:

Correct Answer: 38. (a)

Solution:

  1. (a) Efficiency of ideal heat engine, $\eta=(1-\frac{T_2}{T_1})$

Sink temperature, $T_2=100^{\circ} C=100+273=373 K$

Source temperature, $T_1=0^{\circ} C=0+273=273 K$

Percentage efficiency, $% \eta=(1-\frac{T_2}{T_1}) \times 100$

$ =(1-\frac{273}{373}) \times 100=(\frac{100}{373}) \times 100=26.8 % $