Abstract: This chapter provides an overview of capacitors. A capacitor is an arrangement of conductors that are insulated from each other so that charge can be stored. When Direct Current (DC) or pulse waveforms are applied to capacitors, the charge and discharge behavior is important. The simplest type of capacitor is the parallel-plate type, using air as its insulation between the plates. If any solid or liquid insulator is placed between the plates, the capacitance of the arrangement is increased, and the factor by which the capacitance is increased is called the relative permittivity of the material between the plates. The chapter describes several capacitors, one of them is electrolytic capacitor. The principle is that several metals, notably aluminum and tantalum, can have very thin films of their respective oxides formed on the surface when a voltage is applied in the correct polarity between the metal and a slightly acidic liquid. These very thin films then insulate the metal from the conducting liquid, the electrolyte, forming a capacitor, an electrolytic capacitor. Another capacitors are variable capacitors, such capacitors, once used in radio receivers, are now available only for replacement purposes and can be quite difficult to find.
Publication Year: 2001
Publication Date: 2001-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
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Cited By Count: 1
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