NEET 2000 Physics question
The ratio for a carnot - engine is . Now the temp. of sink is reduced by , then this ratio becomes twice, therefore the initial temp. of the sink and source are respectively :
Answer: (2)
Solution
The efficiency of a Carnot engine is with temperatures in kelvin. Initially , so . After lowering the sink by 62 K (a change of equals 62 K): , so
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