The Student Room Group

This discussion is now closed.

Check out other Related discussions

How do NTC thermistors work?

Title says it, nowhere really seems to say :s

Thanks
Reply 1
Avatar for Archduke
Archduke
4
After a quick google, the first result threw out this:

NTC Thermistor

Not too hard, was it?
Reply 2
Avatar for dh00001
dh00001
16
A thermistor's operation is a function of the electron-hole pair theory. As the temperature of the semiconductor rises, the electron-hole pair generation increases (due to thermal agitation). Increased electron-hole pairs causes a drop in resistance and a resultant increase in current flow.
There are two classes of thermistors: positive temperature coefficient (PTC) and negative temperature coefficient (NTC). With NTC, an increase in temperature causes a decrease in thermistor resistance
With PTC, a relatively small increase in temperature at the switch temperature point causes an extremely large increase in thermistor resistance. A PTC thermistor will have relatively low resistance levels during its ON state and relatively high resistance levels during its OFF state.
Most thermistors operate on an NTC, although some applications require operation on a PTC.
For basics, remember LURD and TURD
Light Up Resistance Down
Temperature Up Resistance Down

Just something that has stuck with me since GCSE :smile:
(edited 5 years ago)
Original post by caitlinoflaherty
For basics, remember LURD and TURD
Light Up Resistance Down
Temperature Up Resistance Down

Just something that has stuck with me since GCSE :smile:


I just remember the physics moves lol draw stick people 😆

Related discussions

Latest

Trending

Trending

Articles for you