Exam-style question
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What is an analogue signal?.
- A.A signal that varies continuously over time
- B.A signal that represents data in discrete values
- C.A signal that can only take on two values
- D.A signal that is always digital
Model answer
What a good answer should say
- A signal that varies continuously over time
Explanation
Why this works
An analogue signal is defined as one that varies continuously, representing physical quantities. In contrast, digital signals represent data in discrete values.
Analogue signals are used in applications like audio and video transmission, where smooth variations are essential. Thus, the key difference is that analogue signals provide a continuous representation, while digital signals do not.
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