\(\left(P+\frac{a}{{V}^{2}}\right)(V-b)=RT\) represents the equation of state of some gases. Where P is the pressure, V …

\(\left(P+\frac{a}{{V}^{2}}\right)(V-b)=RT\) represents the equation of state of some gases. Where P is the pressure, V is the volume, T is the temperature and a, b, R are the constants. The physical quantity, which has dimensional formula as that of \(\frac{{b}^{2}}{a}\), will be:

[JEE Main 2023, 1 Feb (Shift 1)]