Year 13s, where are you at in your university decision making?

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Thermistor - Non Ohmic Or Ohmic?

Definition of an Ohmic Conductor: "For a conductor at constant temperature the current in the conductor is proportional to the voltage across it."

Therefore, could it be argued that a thermistor is an ohmic conductor, for if you did not change the temperature, and only changed the current, the resistance would remain the same? (Obviously by increasing the current, you are also increasing the power disappated by the component and thus the heat that it emits; but if this effect could somehow be buffered, i.e. still keeping the component at constant temperature, wouldn't the resistance still remain the same?). Any thoughts? :confused:

:confused:

the temp has to change....otherwise it wudnt b a thermistor wud it...therefore it isnt ohmic......NOT 2 SURE

as the temp. rises, the resistances falls sharply..therefore its non-ohmic.. (unsure aswell, but i think this is the general idea)

Definitely non-ohmic for the reasons above... but to add some certainty I thought Id say it :smile:

:smile:

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