1.

For increasing the efficiency of Carnot's engine, which of the folowing is most effective:

Answer»

increasing the temperature of SOURCE by `80^(@)C`
decreasing temperature of sink by `80^(@)C`
increasing temperature of source by `40^(@)C` and decreasing temperature of sink by `40^(@)C`
all the above steps are equally effective.

Solution :`n=1-(T_(2))/(T_(1))` For increasing of `eta` decreasing the value of
`T_(2)` is most effective.
Thus, correct choice is (B).


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