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A non-ohmic resistor doesn't have a constant resistance. A ohmic resistor has a constant resistance.
Resistors are ohmic and fixed whereas metrosils are non ohmic and variable - version of a varistor.
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.
which law follow non ohmic substances
no.....thermistors are not ohmic.
Diode is a non-ohmic conductor since in diodes current-voltage relation ship does't obey Ohm's law....the relationship between current and voltage is nonlinear here,...
Vacuum tubes are non-ohmic devices
ohmic conductor does obey ohm 's law. non ohmic conductor does not obey ohm's law.
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
-- Voltage between two points-- Resistance of the conducting path between the same two points-- Current that flows between the two pointsAnswerThere are two quantities involved with Ohm's Law: potential difference and current. For a circuit to obey Ohm's Law, the ratio of potential difference must be constant. Not many circuits obey Ohm's Law. Those that do, are called 'linear' or 'ohmic' circuits; those that don't are termed 'non-linear' or 'non-ohmic'.
iron,gold
ohmic conductors are those which obey ohm's law