Question

What are ohmic and non-ohmic devices? Give examples.

Answer 1

Ohm's law

1. Ohm’s law states that the voltage across a conductor is directly proportional to the current flowing through it, provided all physical conditions and temperatures remain constant.
2. Georg Simon Ohm, a German physicist was the first to verify Ohm’s law experimentally.

$V=IR$

Ohmic devices:

1. Ohmic devices are those that obey Ohm's law.
2. Resistors and wires are two examples.
3. In this graph between current and voltage is a straight line.

Non-Ohmic devices:

1. Non-ohmic devices are those that do not obey Ohm's law.
2. Vacuum tubes and thermistors are two examples.
3. In this graph between current and voltage is not a straight line.