A) 400 J
B) 800 J
C) 600 J
D) 500 J
Correct Answer: B
Solution :
The efficiency of engine is defined as the ratio of work done to the heat supplied ie, \[\eta =\frac{W}{Q}=1-\frac{{{T}_{1}}}{{{T}_{2}}}\] \[\frac{200}{Q}=1-\frac{300}{400}\] Or \[\frac{200}{Q}=\frac{100}{400}\] \[\Rightarrow \] \[Q=800\,J\]
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