Thank you for reporting, we will resolve it shortly
Q.
A dielectric introduced between the plates of a parallel plate condenser
UPSEEUPSEE 2011Electrostatic Potential and Capacitance
Solution:
If a dielectric medium of dielectric constant $K$ is filled completely between the plates then capacitance increases by $K$ times
$ C^{\prime}=\frac{K \varepsilon_{0} A}{d} $
$\Rightarrow C^{\prime} =K C$