The efficiency of the reversible heat engine is `eta_(r)` and that of irreversible heat engine is `eta_(l)`. Which of the following relations is correct?

Options

A. `eta_(r) gt eta_(l)`
B. `eta_(r) lt eta_(l)`
C. `eta_(r) gt eta_(l)`
D. `eta_(r) gt 1 and eta_(l) lt 1`

Answer

A

Explanation

The effeiciency of reversible engine is always greater than that of irreverible engine. In case of irreversible engine, a part of the energy may be dissipated against friction etc.