Exam-style question
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Thermistor alarm ? choose the chain that makes the buzzer switch on as temperature rises. Use this to support: Distinguish amplitude modulation from frequency modulation.
- A.thermistor alarm: falling thermistor resistance changes divider voltage past the comparator threshold for Amplitude and frequency modulation.
- B.thermistor alarm: claims temperature changes capacitance.
- C.thermistor alarm: reverses hot and cold resistance behaviour.
- D.thermistor alarm: forgets the threshold stage.
Model answer
What a good answer should say
- The correct option is thermistor alarm: falling thermistor resistance changes divider voltage past the comparator threshold for Amplitude and frequency modulation.
Explanation
Why this works
This is the best answer because the thermistor alarm context requires that exact electronics relationship. The other options are incorrect because they use a different component, reverse the circuit behaviour, or omit the output interpretation required for Amplitude and frequency modulation.
Common mistake
No common mistake is linked to this question yet.