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There are different kinds of trimmer capacitors, but the most common type is made from interleaved layers of metal and Mylar (or some kind of plastic) with a screw that allow the layers to be tightened together, increasing capacitance as needed. Alternate layers of metal are connected to each terminal, basically making a meshed plate capacitor, where the distance between plates is controlled by the screw.
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Define mica capacitor?
A mica capacitor is simply one that uses the mineral mica as the dielectric or insulator between plates.
Whether film capacitors can be replaced with ceramic or mica capacitor?
Film capacitors cannot be replaced with ceramic or mica capacitors if used for analog signal processing. However, mica capacitors can be replaced with ceramic capacitors in general.
Most commonly used capacitors in electronics circuits are made up of?
pass AC voltages.
Why does generally capacitors are in pico or nano farads not in kilo or mega farads?
Large value capacitors are difficult to make (large value inductors are even harder to make) and take up large volumes of space. One farad capacitors are available in electrolytics, but are about the size of soup cans. If they were made, kilo & mega farad electrolytic capacitors would have volumes of roughly a thousand & a million soup cans respectively! Nonelectrolytic capacitors would be far larger!!!
Why do capacitors leak?
Mostly the leakage of capacitors is due to the resistor.
