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→Key Stage 4
===About Microphones===
: [[Sound]] transfers [[information]] which a [[microphone]] converts into an electrical signal.
: [[Microphone]]s use a coil of [[wire ]] and a [[Permanent Magnet|permanent magnet]] to turn induce a [[vibrationElectrical Current|current]] in the coil when receiver [[vibrate]] into an electrical signals.
: When the receiver [[vibration|vibrates]] the coil of [[wire]] moves around the [[Permanent Magnet|permanent magnet]] to make a [[Electrical Current|current]] in the coil of [[wire]].