The P-V diagram for a cyclic process is a triangle ABC drawn in order. The co-ordinates of A, B and C are $(4,1),(2,4),$ and $(2,1)$ respectively. Calculate the work done in the complete cycle.

Q. The P-V diagram for a cyclic process is a triangle ABC
drawn in order. The co-ordinates of A, B and C are $(4,1),(2,4),$ and $(2,1)$ respectively. Calculate the work done in the complete cycle.

Q. A cyclic process is shown on a $P-V$ diagram. The working fluid is an ideal gas. Four points $A,B,C$ and $D$ are marked on the $P-V$ diagram and corresponding thermodynamic co-ordinates are given. Here, the $P$ and $V$ scales are so chosen that these cycles on $P-V$ diagram appear to be circular.
Analyse these cycles on $P-V$ diagram and answer the following questions about these processes.
What is the work done during expansion in the given process?

Q. A cyclic process is shown on a $P-V$ diagram. The working fluid is an ideal gas. Four points $A,B,C$ and $D$ are marked on the $P-V$ diagram and corresponding thermodynamic co-ordinates are given. Here, the $P$ and $V$ scales are so chosen that these cycles on $P-V$ diagram appear to be circular.
Analyse these cycles on $P-V$ diagram and answer the following questions about these processes.
What is the work done during compression in the given process?

Q. A gas undergoes a cyclic process $a\to b\to c\to a$ which is as shown in the $PV$ diagram. The process $a\to b$ is isothermal , $b\to c$ is adiabatic and $c\to a$ is a straight line on the $P-V$ diagram. Work done in process $ab$ and $bc$ is $5\text{J}$ and $4\text{J}$ respectively. Calculate the efficiency of the cycle, if the area enclosed by the diagram $\text{abca}$ in the figure is $3\text{J}$.

Q. A gas undergoes a cyclic process $a\to b\to c\to a$ which is as shown in the $PV$ diagram. The process $a\to b$ is isothermal , $b\to c$ is adiabatic and $c\to a$ is a straight line on the $P-V$ diagram. Work done in process $ab$ and $bc$ is $5\text{J}$ and $4\text{J}$ respectively. Calculate the efficiency of the cycle, if the area enclosed by the diagram $\text{abca}$ in the figure is $3\text{J}$.