Question

N moles of a monoatomic gas it carried round the reversible rectangular cycle ABCDA as shown in diagram
The temperature at A is $T_0$ The thermodynamic efficiency of the cycle is

• A. 15 %
• B. 20 %
• C. 25 %
• D. 50 %

Answer 1

The correct option is D 50 %

$\begin{array}{c}AtA{P}_0{V}_0=NR{T}_0\to \left(i\right)\\ AtB2P_0{V}_0=MR{T}_1\to \left(ii\right)\end{array}$

Efficiency of thermodynamic cycles

$\eta =1-\frac{T_B}{T_A}=1-\frac{1}{2}=\frac{1}{2}$

$\eta =50\%$

Option D.