- Technical Blog From My Notebook

Friday, March 13, 2020

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

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.

No comments:

Post a Comment