Question

what is the effect of introducing dielectric on capicatance and energy stored per unit volume of a capacitor ?
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Answer 1

Answer:

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Answer 2

Explanation:

1)-The capacitor is charged, and isolated so the charge on the plates is constant. Inserting a dielectric increases the capacitance, reducing the energy stored in the capacitor. The capacitor actually does work to pull the dielectric in between the plates, reducing the stored energy

2)-If C is the value of the capacitance of a capacitor filled with a given dielectric and C0 is the capacitance of an identical capacitor in a vacuum, the dielectric constant, symbolized by the Greek letter kappa, κ, is simply expressed as κ = C/C0. The dielectric constant is a number without dimensions