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Electromagnetic Induction

Why does the ...

Question

Why does the capacitance get added when a capacitor is connected after disconnection? Why does charge remain constant?
Ex-A capacitor of 900pF is disconnected from a battery and then connected to another 900pF capacitor.
Why does capacitor after reconnection to another capacitor get capacitance 1800pF??

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Solution

Capacitor behaves like a battery which charge and discharge abruptly. when charged capacitor is connected to another charge capacitance get added. charge remains same until capacitor get discharge.

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