Efficiency of a heat engine working on Carnot cycle between two temperature levels depends upon the

A. Two temperatures only

B. Pressure of working fluid

C. Mass of the working fluid

D. Mass and pressure both of the working fluid

Answer: Option A

Solution(By Examveda Team)

Efficiency of a Carnot engine is given as $$\left( {{T_1} > {T_2}} \right)\aleph = 1 - \frac{{{T_2}}}{{{T_1}}}$$
So, it's solely dependent on temperatures of the reservoirs.