The more effective way of
increasing efficiency of Carnot engine is to ________ .
Increase higher temperature
Decrease higher temperature
Increase lower temperature
Decrease lower temperature
Decrease lower temperature
The efficiency of Carnot engine is given
by
Where, T1 is sink temperature and T2 is reservoir/ source temperature.
Thus the efficiency can be increased
both by increasing the reservoir temperature (T2) as it appears in the denominator and decreasing sink
temperature (T1) as it
appears in the numerator in the formula. We can also say, T1 is lower temperature and T2is higher temperature. But, the more effective way of increasing the
efficiency of Carnot engine is to decrease lower temperature.
Hence, the correct option is (D).
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