2007-07-12 18:47:58 · 3 answers · asked by iNa~ 1 in Science & Mathematics ➔ Engineering
The plates may or may not be flat plates most surface mount low value non electrolytic caps have flat cases for easy handling.
The key factor in minimizing the size of a cap is the dielectric constant of the spacers. Vacuum has a constant of 1, barium-strontium-titanate (ceramic) has a constant of 7500. This means that the capacitance is 7500 times as much per unit area, as it would be using vacuum. Air by the way has a value of 1.0006.
Oil, Teflon,Mylar,Paper are all common dielectrics used in caps each has its own uses and characteristics, which determines where it is used.
2007-07-12 19:49:48 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Real-world capacitors don't use parallel, rectangular plates, because it's too space-inefficient.
Instead, they use many concentric cylindrical plates, with insulating material in-between. The layers alternate as to which terminal they are connected to. The larger number of layers gives a greater capacitance.
2007-07-12 18:54:56 · answer #2 · answered by lithiumdeuteride 7 · 0⤊ 0⤋
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2007-07-12 19:03:45 · answer #3 · answered by jhon 2 · 0⤊ 0⤋