Which statement about analog signals is true?

Prepare for the Board Certified-TeleMental Health Provider Test. Enhance your skills with multiple choice questions and flashcards. Each question includes explanations and hints. Master your exam!

Multiple Choice

Which statement about analog signals is true?

Analog signals vary smoothly over time and in amplitude; they are continuous in both dimensions. This means the value you read at any instant is part of a continuous curve, and the carrying quantity (like voltage or current) itself changes continuously with time. The statement that best matches this is that an analog signal is a continuous signal whose time-varying quantity is represented by another time-varying quantity. In other words, a microphone’s voltage that changes without steps or jumps illustrates an analog signal. Options describing digital signals (discrete values) or claims that analog signals are only for audio or always tied to radio modulation don’t capture this core idea.

Analog signals vary smoothly over time and in amplitude; they are continuous in both dimensions. This means the value you read at any instant is part of a continuous curve, and the carrying quantity (like voltage or current) itself changes continuously with time. The statement that best matches this is that an analog signal is a continuous signal whose time-varying quantity is represented by another time-varying quantity. In other words, a microphone’s voltage that changes without steps or jumps illustrates an analog signal.

Options describing digital signals (discrete values) or claims that analog signals are only for audio or always tied to radio modulation don’t capture this core idea.

More practice questions