B) In order to function, guitar pickups have to produce sound, so that’s when an electric guitar senses the vibrations of the strings electronically and routes an electronic signal to an amplifier and speaker. The sensing occurs in a magnetic pickup mounted under the strings on the guitar’s body. The pickup consists of a bar magnet wrapped with as many as 7,000 turns of fin wire. Coils and magnets can turn electrical energy into motion. In the same way, they can turn motion into electrical energy. In an electric guitar, the vibrating steel strings produce a corresponding vibration in the magnet’s magnetic field and therefore a vibrating current in the coil. Some pickups use screws for polepieces so that the height of each polepiece can be adjusted. The closer the polepiece is to the string, the stronger the signal. The upper variable resistor adjusts the tone. The resistor and capacitor form a simple low pass filter. Th...
... middle of paper ...
...fier, which increases the electrical signal that comes through it.
F) A common speaker consists of a frame where a permanent magnet and an electromagnet are held in place. Both are positioned so that the electromagnet is directly above the permanent magnet. A diaphragm is attached above the electromagnet. The diaphragm creates the sound wave as it vibrates. The alternating electric current that comes from the amplifier flows through the electromagnet which naturally causes its polar orientation to switch accordingly with the current. The permanent magnet that is below has a fixed polar orientation, so the electromagnetic will find it being constantly attracted and repelled in respect to its own alternation in polar orientation. Since the diaphragm is attached to the electromagnet, it will move up and down as well. This vibration of the diaphragm creates sound waves.
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