What is an Ohmic resistor?

An Ohmic resistor, also simply known as an "Ohmic device" or "Ohmic element," is a component in electrical circuits that follows Ohm's law, which relates voltage (V), current (I), and resistance (R) in a linear manner. Ohm's law is expressed as:

V = I * R

Where:

V represents the voltage across the resistor.
I represents the current flowing through the resistor.
R represents the resistance of the resistor.
In an Ohmic resistor, the resistance (R) remains constant, regardless of the applied voltage or current, and the relationship between voltage and current is linear. This means that if you double the voltage across an Ohmic resistor, the current through it will also double, and vice versa.

Materials and components that exhibit Ohmic behavior typically have a constant resistance over a wide range of operating conditions, and this behavior is a fundamental characteristic of many basic electronic components like resistors, certain types of conductors, and some semiconductor devices in specific operating regions.

It's important to note that not all electronic components behave Ohmically. For example, diodes and transistors exhibit nonlinear voltage-current characteristics and do not follow Ohm's law.