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

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

"The efficiency of all real engines are less than that of the carnot engine." Why?

The efficiency of a carnot heat engine depend on

Efficiency of a Carnot heat engine may be given as

Efficiency of a Carnot heat engine may be given as

Efficiency of Carnot engine