Are Resistors Ohmic Devices? Internet research tells me, they are. My graph says they are Non-Ohmic Devices.

I know that a diode, for instance, is an example of a Non-Ohmic Device because its graph is a curve. However, when I graphed some Voltages (y-axis) and Currents (x-axis) of a resistor, the result was a variation in slopes (which is also the resistance), meaning to say that the graph is not a straight line (even just by looking at the minute fluctuations). Despite that, is the resistor still considered Ohmic? The deviations are not as pronounced as it is in a diode's graph.

Question

Are Resistors Ohmic Devices? Internet research tells me, they are. My graph says they are Non-Ohmic Devices.

I know that a diode, for instance, is an example of a Non-Ohmic Device because its graph is a curve. However, when I graphed some Voltages (y-axis) and Currents (x-axis) of a resistor, the result was a variation in slopes (which is also the resistance), meaning to say that the graph is not a straight line (even just by looking at the minute fluctuations). Despite that, is the resistor still considered Ohmic? The deviations are not as pronounced as it is in a diode's graph.

priths · Answer

First of all you should check your graph first because in my opinion resistors are ohmic devices.

ananth · Answer

there is no perfect ohmic devices because resistance varies(goes down) as the temperature increases for metals and nonmetals. As power was decipated into a substance it's temperature increases so resistance varies.. but in case of diodes resistance varies in opposite way due to change in charge carriers for different voltages.. in ohmic devices number of free charge carriers do not vary with temperature but in non ohmic devices vary