Ohm’s law states the relationship between the current flowing through a metallic wire and the potential difference across its terminals.
Ohm’s law states that “At a constant physical Conditions (such as temperature, pressure etc) the amount of current flowing in a circuit is directly proportional to voltage (Potential difference) in the circuit.
Mathematically it can be written as V ∝ I
Here proportional can be replaced by constant ‘R’.