Question

Distinguish between Ohmic and non-
ohmic substances; explain with the help
of example.
DC current flows in a metal piece of non-
uniform cross-section. Which of these
quantities remains constant along the
conductor: current, current density or
drift speed?
219​

Answer 1

Answer:

The main difference between an Ohmic and a non-Ohmic conductor is whether they follow Ohm's law. An Ohmic conductor would have a linear relationship between the current and the voltage. With non-Ohmic conductors, the relationship is not linear. A good example of an Ohmic conductor is the resisto