Question

In the verification of Ohm's law, what is observed when the ratio of potential difference and current $(V/I)$ is calculated for all the readings? What do you conclude?

Answer 1

According to Ohm's law for a conductor under constant temperature, the current flowing between two points is directly proportional to the potential difference between the points.

The formula for Ohm's law is as follows

$$\begin{gathered} V=IR \\ \frac{V}{I}=R \end{gathered}$$

Where $V$ is the potential difference, $I$ is current and $R$ is the resistance.

In the verification, we observe that for all the readings of $V$ and $I$, the ratio $\frac{V}{I}$ is constant.

Since the ratio of $V$ and $I$ is equal to the resistance of the material and from the above observation $\frac{V}{I}=cons\tan t$, we conclude that a given conductor has a constant value of resistance.