A) \[400\text{ }J\]
B) \[800\text{ }J\]
C) \[600\text{ }J\]
D) \[500\text{ }J\]
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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