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A fixed capacitor is constructed in such manner that it possesses a fixed value of capacitance which cannot be adjusted. A fixed capacitor is classified according to the type of material used as its dielectric, such as paper, oil, mica, or electrolyte.
A fixed capacitor is needed, to stop the battery voltage from getting into the amplifier but allow the signal from the moving plate, which is, of course, the diaphragm. |
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