Dielectric is an insulating material used in variable capacitors to store electrical energy by polarization without conducting current.
A dielectric is a non-conductive material that becomes polarized when subjected to an electric field, enabling energy storage in capacitors. In variable capacitors, it separates conductive plates and determines capacitance through its permittivity, thickness, and area. Dielectrics prevent electrical discharge while allowing electrostatic field formation, crucial for tuning and filtering in electronic circuits.
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The dielectric separates conductive plates, stores electrostatic energy via polarization, and allows capacitance adjustment by changing plate overlap or dielectric position, enabling tuning in circuits.
Higher dielectric constant increases capacitance for a given size, but may reduce stability or increase losses. Selection balances capacity, frequency response, and temperature stability.
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