Physics (AS & A Level) · May / June 2018 · Paper 11 · Question 4

In the circuit shown, an analogue ammeter is to be recalibrated as a thermometer. The ammeter is connected in series with a thermistor. The thermistor is a component with a resistance that varies with temperature. The graph shows how the resistance R of the thermistor changes with temperature T. Which diagram could represent the temperature scale on the ammeter?

1. A0 20 40 60 80 100 °C
2. B0 20 40 60 80 100 °C
3. C100 80 60 40 20 0 °C
4. D100 80 60 40 20 0 °C

As printed in the paper