$A$ parallel plate air capacitor has capacity $C$ and separation between the plates is $d$. $A$ potential difference $V$ is applied between the plates. The force of attraction between the plates of the parallel plate air capacitor is:
- A$\frac{C^2 V^2}{2 d^2}$
- B$\frac{C^2 V^2}{2 d}$
- C$\frac{C V^2}{2 d}$
- D$\frac{C V^2}{d}$
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