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Guess a possible reason why water has a ...

Guess a possible reason why water has a much greater dielectric constant (=80) than say, mica(=6).

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Water molecules have permanent dipole moments and generate large electric field due to polarisation when placed in external electric field. Electric field generated due to polarisation is opposite to the applied field and dielectric constant is defined as:
`K=(E_(0))/(E )=(E_(0))/(E_(0)-E_(P))`
Thus, water has a high value of dielectric constant (K).
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