Uploaded March 2021 | Updated September 2026, 2 weeks ago
When looking into Ohms Law you soon find that there are what are called Ohmic and non-Ohmic conductors and components.
In this video aimed at STEM learning / STEM education, we describe what ohmic and non-ohmic conductors are and explain the differences between them as well as showing some examples of how these components respond by doing some simple tests and measurements.
The video starts by recapping Ohm's Law which this states that the the current flowing in a circuit is directly proportional to the applied potential difference and inversely proportional to the resistance in the circuit.
In other words, this means that by doubling the potential difference across a linear circuit such as a resistor, the current will also double. However if the resistance is doubled the current will fall by half.
The standard equation that covers Ohms Law is V = I times R and this equation can be manipulated so we can calculate any of the variables of the other two are known. For example, R = V divided by I and I = V divided by R.
Ohmic conductors or electronic components are ones where the resistance remains the same whatever potential difference - the ratio of V to I remains constant, and we should get a straight line plot if we look at a graph of current and voltage.
But there are many components where the resistance changes as the potential difference or voltage across the component varies.
The incandescent light bulb is a prime example. Here the filament becomes white hot to give out its light, but the resistance of the filament changes with temperature.
Another example f the semiconductor diode where it conducts in the "forward" direction after an initial "turn-on" voltage is exceeded. In the other direction, i.e. the reverse direction it does not conduct.
Both the incandescent light bulb and the semiconductor change their resistance with the applied potential difference and therefore they are non-Ohmic.
The video is aimed at various STEM learning / STEM education situations where basic Ohm's law and Ohms law applicability to other components is being taught.
Read more about Ohmic and Non-Ohmic conductors and components here: electronics-notes.com/articles/basic_concepts/resistance/ohmic-nonohmic-linear-conductors.php
Associated website: electronics-notes.com
Don’t forget to subscribe to the ElectronicsNotes YouTube channel: youtube.com/channel/ElectronicsNotes
When looking into Ohms Law you soon find that there are what are called Ohmic and non-Ohmic conductors and components.
In this video aimed at STEM learning / STEM education, we describe what ohmic and non-ohmic conductors are and explain the differences between them as well as showing some examples of how these components respond by doing some simple tests and measurements.
The video starts by recapping Ohm's Law which this states that the the current flowing in a circuit is directly proportional to the applied potential difference and inversely proportional to the resistance in the circuit.
In other words, this means that by doubling the potential difference across a linear circuit such as a resistor, the current will also double. However if the resistance is doubled the current will fall by half.
The standard equation that covers Ohms Law is V = I times R and this equation can be manipulated so we can calculate any of the variables of the other two are known. For example, R = V divided by I and I = V divided by R.
Ohmic conductors or electronic components are ones where the resistance remains the same whatever potential difference - the ratio of V to I remains constant, and we should get a straight line plot if we look at a graph of current and voltage.
But there are many components where the resistance changes as the potential difference or voltage across the component varies.
The incandescent light bulb is a prime example. Here the filament becomes white hot to give out its light, but the resistance of the filament changes with temperature.
Another example f the semiconductor diode where it conducts in the "forward" direction after an initial "turn-on" voltage is exceeded. In the other direction, i.e. the reverse direction it does not conduct.
Both the incandescent light bulb and the semiconductor change their resistance with the applied potential difference and therefore they are non-Ohmic.
The video is aimed at various STEM learning / STEM education situations where basic Ohm's law and Ohms law applicability to other components is being taught.
Read more about Ohmic and Non-Ohmic conductors and components here: electronics-notes.com/articles/basic_concepts/resistance/ohmic-nonohmic-linear-conductors.php
Associated website: electronics-notes.com
Don’t forget to subscribe to the ElectronicsNotes YouTube channel: youtube.com/channel/ElectronicsNotes
