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Which of the following polarisations is very rapid?

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Which of the following polarisations is very rapid?

(a) Electronic polarisation

(b) Ionic polarisation

(c) Space charge polarisation

(d) Orientation polarisation

The question was asked in my homework.

This is a very interesting question from Properties of Dielectric Materials topic in division Dielectrics of Engineering Physics II

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Right choice is (a) Electronic polarisation

The explanation: Electronic polarisation is very rapid and will complete at the instant the voltage is applied. The reason is that the electrons are very light particles. Therefore even for high frequency this kind of polarisation occurs.

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