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Effect of temperature on resistance of thermistors watch

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    Hi! A question involves a scenario of where a thermistor is placed in a beaker of water. I'd just like to know a short explanation of why the resistance of the thermistor decreases as the temperature of the water increases.

    Thank you very much!
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    (Original post by algebrax1)
    Hi! A question involves a scenario of where a thermistor is placed in a beaker of water. I'd just like to know a short explanation of why the resistance of the thermistor decreases as the temperature of the water increases.

    Thank you very much!
    the thermistor is made of a crystal of semiconductor, as the temperature increases the atoms in the crystal shake more violently and more charge carriers, i.e. electrons are shaken loose and become free to take part in current conduction.

    It doesn't happen in metals which are held together by a different sort of bonding - more like a sea of electrons flowing around islands of atomic nuclei.

    hopefully that'll do for gcse.
 
 
 
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