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I have two questions concerning capacitors:

1) We know that the capacitance of a capacitor also depend on the dielectric material inside as

$C=$ $\dfrac{K \epsilon_0 A}{d}$

But what if the material itself with which the capacitor is made is changed? So is there different values for a capacitor made of iron and one made of copper? Will it follow the same formula?

2) What if we put another plate inside one capacitor either parallely or obliquely as

Initially:

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Modified:

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OR:

enter image description here

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1 Answer 1

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1) You're asking about non ideal capacitors (see e.g. here), i.e. answer to your question is 'yes'. The formula assumes that capacitor's plates are the perfect conductors. 2) Oblique - will not work since you connect the plates, the last one can be decomposed into three capacitors joined in parallel.

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