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Question

What is the effect of temperature on dielectric constant?


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Solution

The effect of temperature on dielectric constant:

  1. The dielectric constant is inversely proportional to temperature. It means when one increases other must decrease. k1T Here, k=dielectricconstant,T=temperature.
  2. As the temperature rises, the dielectric constant decreases.
  3. +ve charges in the dielectric are displaced minutely in the electric field's direction, whereas negative charges are displaced minutely in the opposite direction. This minuscule charge separation, or polarisation, reduces the electric field within the dielectric.
  4. A simple capacitor model may be used to calculate the dielectric constant, which is defined as the ratio of a material's electric permeability to that of empty space (i.e., vacuum).

k=EE0
k= dielectric constant
E= The permittivity of the substance
E= The permittivity of a vacuum


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