Multiple choice

Which instrument is used to convert sound waves into electric waves?

  1. Motor

  2. Dynamo

  3. Microphone

  4. Transformer

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

A microphone converts sound waves (mechanical energy) into electrical signals (electrical energy) through a diaphragm that vibrates in response to sound pressure. This is the principle behind all audio recording and communication devices.