CAIE A-Level Physics AS 9.3.8 The Resistance of a Thermistor Decreases As the Temperature Increases It Questions

Explain that thermistor resistance decreases as temperature increases.

Exam points

Explain that thermistor resistance decreases as temperature increases.

[Maximum number: 1]

A battery of electromotive force (e.m.f.) 12 V and negligible internal resistance is connected to a fixed resistor of resistance $40 \Omega$ and a thermistor of resistance $R_{\mathrm{T}}$ , as shown.

Figure for Question CAIE A-Level Physics AS 9.3.8 The Resistance of a Thermistor Decreases As the Temperature Increases It Questions question 1 — CAIE A-Level Physics AS

Initially, the temperature of the thermistor is $15^{\circ} \mathrm{C}$ and the current in the circuit is 0.10 A .
The temperature of the thermistor then changes, which causes the current to increase to 0.12 A .
How does the temperature of the thermistor change and what is $R_{\mathrm{T}}$ at the new temperature?

temperature

of thermistor

$R_{\mathrm{T}}$ at new

temperature $/ \Omega$

increases

decreases

increases

100

decreases

100

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CAIE A-Level Physics AS 9.3.8 The Resistance of a Thermistor Decreases As the Temperature Increases It Questions question 1