Which of the following devices uses analog signals? – Challenging A computerA microphoneA digital camera

A microphone uses analog signals. Here's why:

1. Analog signals are continuous signals that change over time. They can have any value within a certain range, and they can represent information like sound, light, temperature, etc.

2. A microphone works by converting sound waves (which are analog) into electrical signals. When you speak or sing into a microphone, it picks up the sound waves produced by your voice. These sound waves cause a diaphragm inside the microphone to vibrate.

3. These vibrations are then converted into an electrical current, which is an analog signal because it's a continuous representation of the sound waves.

4. This analog signal can then be amplified, recorded, or transmitted as needed. So, a microphone uses analog signals to capture and process sound.

On the other hand, a computer and a digital camera use digital signals. Digital signals are discrete time signals generated by digital modulation. Unlike analog signals, digital signals can only take on a finite number of values.