Speaker
Contents
Key Stage 3
Meaning
A picture of a speaker.
A speaker is an electrical device that vibrates to produce a sound.
About Speakers
- Speakers use an coil of wire and a permanent magnet to vibrate a paper cone.
- When the current changes direction the paper cone moves. An alternating current causes the cone in the speaker to vibrate.
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| A diagram of a speaker. |
Key Stage 4
Meaning
A picture of a speaker.
A speaker is an electrical device that uses the motor effect to vibrate a diaphragm to produce a sound.
About Speakers
- Speakers have a coil of wire and a permanent magnet to use the motor effect to vibrate a diaphragm attached to the coil of wire.
- When the current changes direction the coil of wire moves. An alternating current causes the coil in the speaker to vibrate the diaphragm.
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| A diagram of a speaker. |