Understanding Digital and Analog Signals

What is a key characteristic of analog signals?

• They are only used in digital watches.

• They are immune to noise interference.

• They are continuous and can vary in amplitude and frequency.

• They are discrete and use binary numbers.

How do digital signals differ from analog signals?

• Digital signals are continuous and analog signals are discrete.

• Digital signals are represented by binary numbers, while analog signals are continuous.

• Digital signals are more affected by noise than analog signals.

• Digital signals can take any value, unlike analog signals.

What are the two values used in digital signals?

• Positive and negative

• On and off

• High and low

• One and zero

Why are digital signals preferred for long-distance communication?

• They require less power to transmit.

• They are less affected by noise, maintaining signal integrity.

• They can carry more data than analog signals.

• They are cheaper to transmit.

What happens to an analog signal when it is converted to digital for transmission?

• It becomes more susceptible to noise.

• It loses its original quality.

• It can be perfectly converted back to analog after transmission.

• It cannot be converted back to analog.