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## What is Ohm’s Law? Ohm's Law Statement Formula & Examples

### What is Ohm’s Law?

Ohm’s Law applies to  electric conduction through good conductors.

### Ohm’s Law Statement:

Ohm's law can be stated as, the ratio of potential difference (V) between any two points on a conductor to the current (I) flowing between them, is constant, provided the temperature of the conductor does not change.

### Ohm’s Law Formula:

In other words, V/I= constant

or V/I= R
where R is the resistance of the conductor between the two points considered.

Put in another way, it simply means that provided R is kept constant, current is directly proportional to the potential difference across the ends of a conductor.

However, this linear relationship between V and I does not apply to all non-metallic conductors.

For example, for silicon carbide, the relationship is given by V = KI m where K and m are constants and m is less than unity.

Ohm’s Law  also does not apply to non-linear devices such as Zener diodes and voltage-regulator (VR) tubes.