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The dielectric constant of water is very...

The dielectric constant of water is very high. Yet why is water not used as a dielectric in a capacitor?

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Only pure water is a good insulator. But, impure water acts as an electrolytic conductor. So, water is not suitable as a dielectric in a capacitor. Also, water is a liquid and so it is inconvenient to use it as a dieleectric in a capacitor as it can spill.
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