Question
Is it possible to keep a parallel plate capacitor of capacity 1 Farad in your cupboard?
✓
Answer
Since the capacitance of the conductor is $C =4$ $\pi \in \in_0 R$, the value of its radius is
$ \begin{aligned} R=\frac{C}{4 \pi \in_0} & =9 \times 10^9 m / \text { Farad } \times 1 \text { Farad } \\
& =9 \times 10^9 m=9 \times 10^6 km \end{aligned} $
Therefore, this radius is very large. That is, it is not possible to make a spherical conductor of 1 Farad capacitance, which can not be kept in a cupboard.
$ \begin{aligned} R=\frac{C}{4 \pi \in_0} & =9 \times 10^9 m / \text { Farad } \times 1 \text { Farad } \\
& =9 \times 10^9 m=9 \times 10^6 km \end{aligned} $
Therefore, this radius is very large. That is, it is not possible to make a spherical conductor of 1 Farad capacitance, which can not be kept in a cupboard.
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