An electrostatic capacitor is a passive two-terminal electronic component that stores electric energy in an electric field. A cylindrical capacitor is a specific type of capacitor where the conductive plates are shaped like cylinders. This type of capacitor is also known as a "cylindrical parallel plate capacitor" or simply a "cylindrical capacitor."
In a cylindrical capacitor, the basic construction consists of two coaxial (concentric) cylinders. One cylinder serves as the inner conductor, and the other serves as the outer conductor. The space between the cylinders is filled with a dielectric material, which is an insulating material that enhances the capacitor's performance by reducing electric field strength and increasing capacitance.
The capacitance of a cylindrical capacitor can be calculated using the following formula:
=
2
ln
(
/
)
C=2πε
ln(b/a)
L
Where:
C is the capacitance of the cylindrical capacitor.
ε is the permittivity of the dielectric material between the cylinders.
L is the length of the cylinders (overlap distance).
a is the radius of the inner cylinder.
(