Department of Pre-University Education, Karnataka course PUC Karnataka Science Class 12
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The Dielectric Constant Decreases If the Temperature is Increased. Explain this in Terms of Polarization of the Material. - Physics

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ConceptCapacitance of a Parallel Plate Capacitor with and Without Dielectric Medium Between the Plates

Question

The dielectric constant decreases if the temperature is increased. Explain this in terms of polarization of the material.

Solution

The amount of polarisation can be understood as the extent of perfect alignment of the molecules of a dielectric with an external electric field. The more aligned the molecules are with the external magnetic field, the more is the polarisation and the more will be the dielectric constant.
But with increase in temperature, the thermal agitation of the molecules or the randomness in their alignment with the field increases.
Thus, we can say that increase in temperature results in reduced polarisation and reduced dielectric constant.

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APPEARS IN

 HC Verma Solution for Concepts of Physics - Vol. 2 (2018 to Current)
Chapter 9: Capacitors
Short Answers | Q: 6 | Page no. 163
Solution The Dielectric Constant Decreases If the Temperature is Increased. Explain this in Terms of Polarization of the Material. Concept: Capacitance of a Parallel Plate Capacitor with and Without Dielectric Medium Between the Plates.
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