[h3]Ohmic and Non-Ohmic Devices[/h3]
[b]An Ohmic Device is one which's potential difference is directly proportional to the current going through it[/b]
So the [b]Voltage[/b] is directly proportional to the [b]Amperes[/b].
[img style='width:100vw' src='https://res.cloudinary.com/deylrqt2d/image/upload/v1485810496/ohmic_nonohmic_devices_nl8udd.svg']
In the above example we can see that the [b]lamp/bulb[/b] has varying resistance, but at the x/y intersection it is very low.
The [b]lamp[/b] has resistance that increases, when more current is added in, and the current causes the substance to heat up if there is too much, which in turn excites the ions in the substance, and causes more collisions.
We can also see that the [b]resistor/wire[/b] has uniform low resistance
And we can see that the [b]non-ohmic diode[/b] had very high resistance until it suddenly turned into a uniform line of relatively low resistance.
[img style='width:100vw' src='https://res.cloudinary.com/deylrqt2d/image/upload/v1485812432/resistance_graph_1_nnofo6.svg']
[img style='width:100vw' src='https://res.cloudinary.com/deylrqt2d/image/upload/v1485812865/resistance_graph_2_l5j3nd.svg']