An uncharged parallel plate capacitor having a dielectric of constant $K$ is connected to a similar air cored parallel capacitor charged to a potential $V$. The two capacitors share charges and the common potential is $V$. The dielectric constant $K$ is
An uncharged parallel plate capacitor having a dielectric of constant $K$ is connected to a similar air cored parallel capacitor charged to a potential $V$. The two capacitors share charges and the common potential is $V$. The dielectric constant $K$ is
- A
$\frac{V^{\prime}-V}{V^{\prime}+V}$
- B
$\frac{V^{\prime}-V}{V^{\prime}}$
- C
$\frac{V^{\prime}-V}{V}$
- D
$\frac{V-V^{\prime}}{V^{\prime}}$
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- [IIT 1988]