Physics (AS & A Level) · Feb / March 2023 · Paper 12 · Question 37

A battery of negligible internal resistance is connected in series with a thermistor and a fixed resistor of resistance 12.0 kΩ, as shown. The table shows the resistance of the thermistor at two different temperatures. temperature / °C | resistance of thermistor / kΩ 20.0 | 12.0 50.0 | 5.00 The potential difference V_out across the fixed resistor is 4.50 V when the thermistor is at a temperature of 20.0 °C. What is V_out when the thermistor is at a temperature of 50.0 °C?

1. A2.65 V
2. B3.18 V
3. C6.35 V
4. D10.8 V

As printed in the paper