Exam-style question
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Amplitude modulation ? choose the correct carrier description. Use this to support: Describe the function of an astable circuit.
- A.amplitude modulation: the carrier amplitude varies while carrier frequency remains approximately fixed for Astables.
- B.amplitude modulation: claims amplitude is fixed and frequency changes.
- C.amplitude modulation: uses a capacitor time delay.
- D.amplitude modulation: describes digital logic only.
Model answer
What a good answer should say
- The correct option is amplitude modulation: the carrier amplitude varies while carrier frequency remains approximately fixed for Astables.
Explanation
Why this works
This is the best answer because the amplitude modulation 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 Astables.
Common mistake
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