Question

which three of the following statements describe an analog signal?
continuous signal
represented by a sine wave
records sound waves as they are
discontinuous values
question: 8/10

Explanation:

To determine which statements describe an analog signal, we recall the properties of analog signals:

1. Continuous signal: Analog signals are continuous in both time and amplitude, so this describes an analog signal.
2. Represented by a sine wave: Analog signals can be represented by smooth, continuous waveforms like sine waves (as they are continuous and have a smooth variation), so this is correct.
3. Records sound waves as they are: Analog audio recording (e.g., vinyl records) captures sound waves in their continuous form, so this describes an analog signal.
4. Discontinuous values: This is a property of digital signals (which have discrete, discontinuous values), so it does not describe an analog signal.

Answer:

The three statements that describe an analog signal are:

• continuous signal
• represented by a sine wave
• records sound waves as they are