NCERT · Class 10 · Science · ElectricityState Ohm's law.

Ohm's law states that the physical conditions such as temperature remaining constant, the electric current flowing through a metallic wire is directly proportional to the potential difference applied across its two ends. Mathematically, it is expressed as V is proportional to I, which can be written as V = IR, where V represents the potential difference, I represents the current, and R is a constant of proportionality known as resistance of the conductor at that given temperature. This fundamental law helps in understanding the relationship between voltage, current, and resistance in electrical circuits.