(a)

Let's look at the expression for the capacitance of a parallel plate capacitor.

$\overline{){\mathbf{C}}{\mathbf{=}}\frac{\mathbf{k}{\mathbf{\epsilon}}_{\mathbf{0}}\mathbf{A}}{\mathbf{d}}}$ where k is the relative permittivity of the material, ε_{0} is permittivity of free space, A is the area, and d is plate separation.

(a) On what parameters does capacitance normally depend?

(b) When a capacitor is fully charged, What current exists in it?

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