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Two parallel capacitors of capacitances ...

Two parallel capacitors of capacitances `C` and `2C` are connected in parallel and charged to a potential difference `V`. The battery is then disconnected, and the region between the plates of `C` is filled completely with a material of dielectric a constant `K`. The common potential difference arcoss the combination becomes.

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`(3/(K+2))` V total charge will remain unchanged hence, =' or 3CV=(KC+2C)V'
`V'(3/(K+2))V`
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