no.....thermistors are not ohmic.
Ohm's law states that the current and potential difference (voltage) are directly proportional, provided the temperature is constant. The resistance of a thermistor is dependant on the temperature, so it does not obey Ohm's law. Components that do not obey Ohm's law are non-ohmic conductors.
define the nonohmic metarials and give examples to them
Tungsten
ohmic conductor does obey ohm 's law. non ohmic conductor does not obey ohm's law.
which law follow non ohmic substances
A non-ohmic resistor doesn't have a constant resistance. A ohmic resistor has a constant resistance.
iron,gold
ohmic conductors are those which obey ohm's law
The symbol of a thermistor is a resistor with an arrow pointing towards it.
A RV absorption refrigerator uses a thermistor as a thermostat. The thermistor is moved up or down to regulate the refrigerator temperature.
An 'ohmic' resistor is one which obeys Ohm's Law. For Ohm's Law to apply, the resistance of a circuit must be constant over the range of incremental voltages applied to it. If the resistance changes over an incremental range of voltages, then it is said to be 'non-ohmic', and it does not obey Ohm's Law.
Vacuum tubes are non-ohmic devices because their resistance changes with voltage and current. This non-linearity in resistance is due to the nature of the electron flow within the vacuum tube, causing it to exhibit non-ohmic behavior.