Question

Consider the following statements A and Band identify the correct answer
A : Thermistors can have only negative temperature coefficients of resistance
B : Thermistors with negative temperature coefficients of resistance are used as resistance thermometers, to measure low temperature of the order of 10 K

• A. Both A and B are true
• B. Both A and B are false
• C. A is true, but B is false
• D. A is false, but B is true

Answer 1

Answer: (A)

A thermistor is a heat sensitive resistor usually made of semiconductor material. The temperature coefficient of a thermistor is negative but is unusually large, of the order of $-0.04{(}^{\circ }C{)}^{-1}$
They are used for resistance thermometers in very low temperature measurement of the order of 10 K