Question

A Carnot engine operating between temperature `T_1 and T_2` has efficiency 1/6. When `T_2` is lowered by 62K its efficiency increase to 1/3. Then `T_1 and T_2` are, respectively:
A. `372K and 330K`
B. `330K and 268K`
C. `310K and 248K`
D. `372K and 310K`

Answer 1

Correct Answer - D
(d) Efficiency of engine
`1/6=1-(T_2)/(T_1) and eta_2=1-(T_2-62)/(T_1)=1/3`
`:. T_1=372K and T_2=5/6xx372=310K`