Multiple choice

Which instrument is used to convert sound waves into electrical energy?

  1. Computer

  2. DVD writer

  3. Microphone

  4. Pen drive

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A microphone converts sound waves into electrical energy through a diaphragm that vibrates in response to sound pressure, creating an electrical signal. This is the fundamental principle behind audio recording and amplification.