Explain the effect of a dielectric on the capacitance of an isolated charged parallel-plate capacitor. Hence, show that if a dielectric of relative permittivity (dielectric constant) k completely fills the space between the plates, the capacitance increases by a factor k .
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Dielectrics are basically insulating and non-conducting substances. They are bad conductors of electric current. Dielectrics are capable of holding electrostatic charges while emitting minimal energy. This energy is usually in the form of heat. The common examples of dielectrics include mica, plastics, porcelain, metal oxides and glass etc. It is important for you to note that dry air is also a dielectric.
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