Expression for the energy stored in a capacitor, Physics

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Derive a mathematical expression for the energy stored in a capacitor. What is the energy stored when the space between the plates is filled with a dielectric

a) With charging battery connected in the circuit,

b) With charging battery disconnected.


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Jkadg;''a, ,adf'';,g.'';fd,g'' fmdlg;lmdf

,adf'';,g.'';fd,g'' fmdlg;lmdf

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