Which of the following descriptions on signal is incorrect?a.Information must be contained in signal.b.Signal is a physical quantity observed or measured.c.Signal can be time-independent.d.Data varies across time is a kind of signal.
Question
Which of the following descriptions on signal is incorrect?a.Information must be contained in signal.b.Signal is a physical quantity observed or measured.c.Signal can be time-independent.d.Data varies across time is a kind of signal.
Solution
The incorrect description on signal is c. "Signal can be time-independent." This is incorrect because signals are typically time-dependent. They vary with respect to time, and this variation is what conveys information.
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