What is the function of a microphone? It converts:
- AElectromagnetic waves into sound signals
- BSound signals into electromagnetic waves
- CSound signals into electric signals
- DElectric signals into sound signals
Show answer and explanation
Correct answer: (c) Sound signals into electric signals
Explanation
A microphone converts sound into electric signals. Sound waves make a thin diaphragm vibrate, and the vibration produces a varying electric current that copies the sound.
A loudspeaker (or headphone) does the opposite: it turns electric signals back into sound. Turning electric signals into radio (electromagnetic) waves is the work of a transmitter's antenna.