A student investigates how the resistance of a thermistor varies with temperature.
Describe the circuit symbol for a thermistor.
The student uses voltmeter and ammeter readings to find the resistance at each temperature. One set of readings is shown below.
| Temperature (∘C^\circ\text{C}∘C) | Voltmeter reading (V\text{V}V) | Ammeter reading (mA\text{mA}mA) |
|---|---|---|
| 50 | 14.5 | 1.85 |
State the equation linking voltage, current, and resistance.
Show that the resistance of the thermistor at 50 ∘C50\ ^\circ\text{C}50 ∘C is about 8000 Ω8000\ \Omega8000 Ω.
Another student takes measurements for two more components, A and B. The graphs show the results.
Compare the results for component A and component B.
