Question

In which process does $P-V$ indicator diagram show a straight line parallel to the volume axis?

• A. Isochoric
• B. Isobaric
• C. Isothermal
• D. Adiabatic

Answer 1

The correct option is B Isobaric

Given that, the $P-V$ indicator diagram shows a straight line parallel to the volume axis.
The pictorial representation is as shown below.


Finding the slope of the graph, we get
$\frac{\Delta P}{\Delta V}=0$
$\Rightarrow \Delta P=0$
Hence, we can say that pressure remains constant.
We know that, if pressure remains constant during a process, we call it as an isobaric process.
Thus, option (b) is the correct answer.