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Question

The efficiency of ideal heat engine working between 320F and 2120F is


A
84.9%
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B
100%
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C
27%
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D
20%
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Solution

The correct option is B 27%
We know efficiency is given by
η=1TLTH
where TL is the lower temperature and TH is the higher temperature  
320F=0 C = 273 K
2120F=100 C = 373 K
η=1273373
=10037327%

Physics

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