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What is the capacitance of a rolled up capacitor?

I think the capacitance of a rolled up capacitor is double to that of a plate capacitor of equal surface area - this is based on the fact that once rolled up, each layer has two surfaces facing an oppositely charged surface (one that is above and one below). Thus there would be + - - + + - - + + etc. layers.

Does rolling-up increase the capacitance of a parallel plate capacitor?

You are correct. Rolling-up increases the capacitance of a parallel plate capacitor by a factor of up to 2 in the limit of many complete turns with a radius much larger than the separation of the plates. When the parallel plate capacitor is not rolled up, only the facing plates can store charge. The outer plates are not used.

What happens if a parallel plate capacitor is not rolled up?

When the parallel plate capacitor is not rolled up, only the facing plates can store charge. The outer plates are not used. When the capacitor is rolled up with an extra layer of dielectric the outer faces of the two plates are now adjacent to each other, forming a second capacitor in parallel with the inner plates.

Are the outer plates used in a capacitor rolled up?

The outer plates are not used. When the capacitor is rolled up with an extra layer of dielectric the outer faces of the two plates are now adjacent to each other, forming a second capacitor in parallel with the inner plates. This is not true for all parts of the "roll."

What is the purpose of a capacitor calculator?

The purpose of the calculator is to determine the capacitance value of both plate and rolled capacitors needed for the circuit's coil. Enter any legal values for the dielectric constant (see our table) of the material used, the area of a plate, the distance between the plates and the number of plates. The material is most often glass.

Do capacitor plates have a total charge?

As the capacitor plates have equal amounts of charge of the opposite sign, the total charge is actually zero. However, because the charges are separated they have energy and can do work when they are brought together. One farad is a very large value of capacitance.

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