Question

How to calculate energy of capacitor filled with dielectric?

Answer 1

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Details of the calculation: When the capacitor is connected to the battery, the energy stored in the air-filled capacitor is U = ½ CV2, and the charge on each plate is q = CV. When the capacitor is filledwith the dielectric liquid, itscapacitance becomes kC, where k is the dielectric constant of the liquid.
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Answer 2

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• The dielectric constant is therefore also known as the relative permittivity of the material.
• Since the dielectric constant is just a ratio of two similar quantities, it is dimensionless.

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