Physics (AS & A Level) · May / June 2023 · Paper 12 · Question 33

A car has sensors for detecting the light intensity and temperature of its environment. The sensors make use of a light-dependent resistor (LDR) and a thermistor. The car moves from a warm and dark environment into a cold and bright environment. What are the changes to the resistances of the LDR and thermistor?

1. Aresistance of LDR increases; resistance of thermistor increases
2. Bresistance of LDR increases; resistance of thermistor decreases
3. Cresistance of LDR decreases; resistance of thermistor increases
4. Dresistance of LDR decreases; resistance of thermistor decreases

As printed in the paper