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A thermistor with a material constant β of 4500K is used in a thermometer. Calculate the...

A thermistor with a material constant β of 4500K is used in a thermometer. Calculate the resistance of this thermistor at 25 °C. Assume that the resistance of this thermistor at body temperature is equal to 85 Ω.

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Answer #1

If R0resistance of the thermistor at body temperature ( T0 =370C= 310K) and is the material constant, then let the resistance of the thermistor at ( T =250C=298 K) is given by  RT

The thermistor equation is given by

Given

Or

Or

or

Or

Thermistor has negative temperature coefficient, which means that resistance of the thermistor decreases with the increase of the temperature   

  

.

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