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Temperature and current in a thermistor
The student replaced one of the resistors with a thermistor.
The student increased the temperature of the thermistor.
Explain how the current in the thermistor changed.
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Marking points
- 1 State that the current increased.
- 2 Explain that this happened because the resistance of the thermistor, or of the circuit, decreased.
Full-mark answer
The current increased because increasing the temperature of the thermistor decreased its resistance.
Why this answer loses marks
The current decreased because the thermistor got hotter.
For this thermistor, increasing temperature decreases resistance, so the current increases.