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Moving Coil

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Moving Coil 

in low-frequency measurement technology, a component of moving-coil measuring systems that is used in light-beam oscillographs and moving-coil galvanometers. A moving coil is a light coil of wire that is located between the poles of a permanent magnet. In a galvanometer, the moving coil is suspended from very thin metallic ribbons; in an oscillograph, it consists of a very thin wire to which a small mirror is attached.

When a current flows through a moving coil, the coil is deflected in the magnetic field. In moving-coil galvanometers, the magnitude of the deflection is read by means of a microscope. In light-beam oscillographs, it is read on the basis of the deflection of a light beam reflected from the mirror.

REFERENCES

See references under STUB.

R. I. PERETS
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Magnetic moment of a current loop; Effect of a uniform magnetic field on a current loop; Moving coil galvanometer, voltmeter, ammeter and their conversions.
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The knob type arrangement has a moving coil or magnet which moves when the knob is pressed and charges a capacitor, which provides power to the bulb.
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In this latest incarnation, Parasound has slightly modified the Zphono with a 100[ohm] resistor-loading in the moving coil mode.
Parasound Zphono ($150): www.parasound.com by Sensible Sound
 
 
 
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