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Two parallel plates, separated by 2 mm o...

Two parallel plates, separated by 2 mm of air, have a capacitance of `3xx10^(-14)muF` and are charged to a potential of 200 V. then without touching the plates, they are moved apart till the separation is 6 mm. (i) what is the potential differene between the plates ? (ii) what is the change in energy?

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SL ARORA-CAPACITORS-problem for self practive
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