CET Karnataka Engineering
CET - Karnataka Engineering Solved Paper-2002
question_answer
A Carnot's engine is made to work between \[200{{\,}^{o}}C\]and\[0{{\,}^{o}}C\]first and then between \[0{{\,}^{o}}C\]and \[-200{{\,}^{o}}C.\]The ratio of efficiencies of the engine in the two cases is:
A)\[1:1.73\]
B)\[1.73:1\]
C) \[1:2\]
D) \[1:1\]
Correct Answer:
A
Solution :
\[{{f}_{1}}=+\,8\,cm\] \[u=-12\,cm\] \[{{f}_{2}}=+\,6\,cm\] Image formed by converging lens is real and inverted. Hence \[\text{IInd}\]lens will produces real inverted and enlarged image.