non ohmic devices are diodes, LED's, Thermistors, LDR(light dependent resistors, cells in series.
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.
the resistant in ohmic devices is constant because it depend on temperature ..and temperature is constant independent of polarity of potential difference...btin non ohmic the tempt increase with voltage which increase due to the heat increase beacue of power dispition....collision of electrons increases find more resistenc for passing so resistence increases
no.....thermistors are not ohmic.
Devices whose resistance remains constant as current increases are called "ohmic devices" or "ohmic resistors." These devices follow Ohm's Law, which states that the voltage across the device is directly proportional to the current flowing through it, maintaining a constant resistance regardless of the current levels. Examples include metallic conductors like copper and aluminum at moderate temperatures.
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
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.
ohmic ocnductor is a material which obeys ohm's law: i.e. the voltage and current are directly proportional 2 each other anda non-ohmic ocnductor is a material which doesn't obey ohm's law:)