State Ohm's law. Draw a labelled circuit diagram to verify this law in the laboratory. If you draw a graph between the potential difference and current flowing through a metallic conductor, what kind of curve will you get? Explain how would you use this graph to determine the resistance of the conductor.

Explanation

### Step-by-Step Solution:

1. **State Ohm's Law**:
Ohm's Law states that the electric current (I) flowing through a conductor is directly proportional to the potential difference (V) across its two ends, provided that the temperature and other physical conditions remain constant. Mathematically, it can be expressed as:
\[ V \propto I \quad \text{or} \quad V = I \cdot R \]
where R is the resistance of the conductor.
...