Question

The graph of voltage versus current for the nonohmic resistor was not a straight line. Describe what happened to the current as the voltage increased, compared to what happened for the ohmic resistor.

Answer 1

In nonohmic register the current and voltage does not follow straight line. It gives a curve with and increasing gradient.

This is because as the voltage increases, the electron carries more energy so when they collide in conductor they transfer more energy. This makes the atom vibrate more and more and this increase the temperature thus increase the resistance. And cause the shape of graph.

Whether in ohmic resistance the graph between current and voltage is straight line. So current increase when voltage increases.