2006-11-11 18:25:49 · 3 answers · asked by arjay l 1 in Science & Mathematics ➔ Physics
The signal arrives at the phone as a fluctuating electrical current (in cell phones, converted from radio waves). When that current runs through the electromagnet in the earpiece, a thin metal plate is made to vibrate, and that turns the signal into sound. A microphone just reverses the process.
2006-11-11 18:36:35 · answer #1 · answered by Philo 7 · 0⤊ 0⤋
Electromagnets are in just about anything electronic that is more advanced then a light-bulb. That includes phones. One easy thing to think of is that electromagnets are used in every speaker to make noise. By turning on and off really fast, it creates vibrations which we hear as sound.
2006-11-12 02:28:56 · answer #2 · answered by Roman Soldier 5 · 0⤊ 0⤋
they make them work
http://www.howstuffworks.com
2006-11-12 02:27:56 · answer #3 · answered by dwh 3 · 0⤊ 0⤋