Two parallel plate 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 the capacitor C is completely filled with a material of dielectric constant K. The potential differences across the capacitors now becomes...........

Explanation

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