ocr: How does a speaker work? Aloudspeaker uses electromagnetism to convert a fluctuating electrical current into sound. COIL OF WIRE PERMANENT MAGNETI Magnets can attract and repel each other, depending on which ends of the magnets are facing each other. Like poles repel each other, while unlike poles attract. A loudspeaker contains a fixed permanent magnet, and a movable coil of wire - an electromagnet L attached to the base of a paper cone. An alternating current (one which changes direction many times a second) carries a sound signal from an amplifier through the coil of wire. Sometimes, curren ...
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