Question

which phrase describes an analog signal and not a digital signal? (1 point)
very little noise
smooth sinusoidal waves
binary code
discrete units of transmission

Explanation:

To determine the correct option, we analyze the characteristics of analog and digital signals:

• "very little noise": Digital signals can also have low noise, so this is not unique to analog.
• "smooth sinusoidal waves": Analog signals are continuous and often represented as smooth, continuous waves like sinusoids. Digital signals are discrete (composed of binary values or discrete units), so this is a key characteristic of analog signals.
• "binary code": This is a fundamental part of digital signals (composed of 0s and 1s), so it describes digital, not analog.
• "discrete units of transmission": Digital signals are transmitted in discrete units (e.g., bits), while analog is continuous. So this describes digital.

Answer:

B. smooth sinusoidal waves