Question:
A cylindrical capacitor is constructed using two coaxial cylinders of the same length $10 \mathrm{~cm}$ and of radii $2 \mathrm{~mm}$ and $4 \mathrm{~mm}$.
(a) Calculate the Capacitance.
(b) Another capacitor of the same length is constructed with cylinders of radii $4 \mathrm{~mm}$ and $8 \mathrm{~mm}$. Calculate the capacitance.
Solution:
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