Theoretically, Ohm's Law stablishes a linear dependence between voltage and current intensity of the form:
being the constant $C$ the resistance $R$.
When measuring voltage an current intensity in a DC circuit and then analysing the data collected frequently is obtained an equation of the form:
Where $V_o$ is the intercept of the fitted line. This last equation doesn't match the theoretical one, so I was wondering if the independent term $V_o$ has a physical meaning.