No real engine can have an efficiency greater than that of a carnot engine working between the same two temperatures, why?

In practise, all heat engines have efficiency less than that of a carnot engine because

In practise, all heat engines have efficiency less than that of a carnot engine because

The efficiency of a Carnot engine working between the steam point and ice pint is

Calculate the efficiency of a carnot engine working between the two temperatures: 30^(@)Cand 100^(@)C

Assetion : No engine can have efficiencyt greater than that of the carnot engine Reason : The efficiencyt of a cornot engine is given by eta =1-(T_(2))/(T_(1))

Assetion : No engine can have efficiencyt greater than that of the carnot engine Reason : The efficiencyt of a cornot engine is given by eta =1-(T_(2))/(T_(1))

Find the efficiency of a carnot's engine working between 500K and 300K

What is the efficiency of a carnot engine working between 300 K and 500 K ?