Frequency dependence of dielectric constant

Question

Accepted Answer

The dielectric constant of a material changes with the frequency of the applied electric field.

Dielectric constant is a measure of a material's ability to store electrical energy in an electric field.
The dielectric constant of a material is frequency-dependent because the polarization mechanisms that contribute to it vary with frequency.
At low frequencies, the dielectric constant is dominated by electronic polarization, while at high frequencies, it is dominated by ionic polarization.
The frequency dependence of the dielectric constant is important in the design of electronic devices such as capacitors and antennas.
Materials with high dielectric constants at high frequencies are used in microwave applications, while those with low dielectric constants are used in high-speed digital circuits.

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