Question

experiment -
Establish current-voltage relationship (Ohm's law) for a metallic conductor,
and find its resistance.​

Answer 1

Answer:

it is to be shown that the ratio V / I remains constant for a given resistance, therefore a graph between the potential difference(V) and the current (I) must be a straight line.

Answer 2

Let us look at the answer:

Explanation:

Ohm's law states that " the electric current flowing in a circuit is directly proportional to the potential difference flowing across it, at a constant temperature."

⇒ I∝V ( constant T)

⇒ V ∝ I   ⇒V = k I ( k is constant of proportionality)  

⇒ V = IR (k=R )

R, resistance is defined as the obstruction offered in the path of electric circuit across a conductor.

⇒ R = V/I  constant for a particular conductor.