Exam-style question
Try this first
In a signal-time graph, how can you identify an analogue signal?.
- A.It has sharp transitions between levels.
- B.It shows a continuous waveform.
- C.It consists of random spikes.
- D.It has a flat line with no variation.
Model answer
What a good answer should say
- It shows a continuous waveform.
Explanation
Why this works
The evidence indicates that analogue signals are depicted as smooth, continuous curves on a graph. This suggests that they can take any value within a range, unlike digital signals which are discrete.
Thus, the conclusion is that the continuous nature of the waveform is a defining characteristic of analogue signals.
Common mistake
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