What are ohmic and non ohmic devices?give example
Answers
Answer:
Ohm’s law states that‘The current flowing through a conductor is directly proportional to the potential difference V across its ends, provided the temperature and physical conditions of the conductor remain the same’.
Hence,
The device which follows ohm's law for all voltages across it is called as an ohmic device.(i.e under constant physical conditions such as temperature, the resistance is constant for all currents that pass through it).
Examples of ohmic devices are : a wire, heating element or a resistor.
The device that does not follow ohm's law is known as a non-ohmic device (i.e the resistance is different for different currents passing through it).
Examples of non ohmic devices are: thermistors, crystal rectifiers, vacuum tube etc.
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