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A capacitor of unknown capacitance is co...

A capacitor of unknown capacitance is connected across a battery of V volts. The charge stored in it is 360 `muC`. When potential across the capacitor is reduced by `120V`. the charge stored in it becomes 120 `muC`.
Calculate:
(i) The potential V and the unknown capacitance C.
(ii) What will be the charge stored in the capacitor, if the voltage applied had increased by 120 V?

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MODERN PUBLICATION-ELECTROSTATIC POTENTIAL AND CAPACITANCE -Revision Exercises (Numerical Problems)
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  16. The capacity of a parallel plate capacitor with air is 18 pF. When a d...

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