An ideal heat engine working between temperatures \(T_1\) and \(T_2\) has an efficiency ;\(\eta \) .

An ideal heat engine working between temperatures \(T_1\) and \(T_2\) has an efficiency ;\(\eta \) . - চর্চা

An ideal heat engine working between temperatures $T_1$ and $T_2$ has an efficiency ; $\eta$ . The new efficiency if the temperatures of both the source and sink are doubled, will be& ;