Physics · May / June 2025 · Paper 11 · Question 30

The graph shows how the resistance of a thermistor varies with temperature. [graph: resistance/Ω vs temperature/°C, curve decreasing from 160 Ω at 0 °C to about 5 Ω at 50 °C] The thermistor is at a temperature of 10 °C and is connected in series with a fixed resistor of resistance 20 Ω. What is the combined resistance of both components?

1. A16 Ω
2. B20 Ω
3. C80 Ω
4. D100 Ω

As printed in the paper