Electric motors and loudspeakers

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  • Electric Motors and Loudspeakers
    • Electric Motors
      • 4 FACTORS WHICH SPEED IT UP
        • More CURRENT
        • More TURNS on the coil
        • STRONGER MAGNETIC FIELD
        • A SOFT IRON CORE in the coil
    • Loudspeaker
      • 1. A.C electrical from an amlifier are fed to a coil of wire in the speaker.
      • 2. The coil is surrounded by a permanent magnet, so the A.C signals cause a force on the coil and make it move back and forth
      • 3. These movements make the cone vibrate and this creates sounds

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