Exam-style question
Try this first
When interpreting a signal-time graph, what does a flat line indicate?.
- A.The signal is at maximum amplitude.
- B.The signal is at zero amplitude.
- C.The signal is fluctuating rapidly.
- D.The signal is being sampled.
Model answer
What a good answer should say
- The signal is at zero amplitude.
Explanation
Why this works
The evidence indicates that a flat line on a signal-time graph represents a constant value, which in this case is zero amplitude. This implies that there is no signal being transmitted during that time.
Thus, the conclusion is that a flat line signifies the absence of any signal activity.
Common mistake
No common mistake is linked to this question yet.