Indepth Electrical engineering

Cylindrical capacitors:- Unlike plate capacitors where 2 plates are used to form a capacitor, cylindrical capacitors are made by using two concentric cylindrical shells or wires and these two cylinders and wires are separated by using a dielectric medium. Only difference between plate capacitor and cylindrical capacitor is its shape. Electrical cable is best example for cylindrical capacitors. How to calculate capacitance of a Cylindrical capacitor:- For Calculating capacitance of a cylindrical capacitor let’s take radius of inner cylinder as r1 and outer cylinder as r2. Now let’s take permittivity of dielectric material used to form capacitor as  ε a . As in case of plate capacitor where one plate is acts cathode and other acts as an anode now in similar case let’s take inner cylinder charge per meter length on outer surface of inner cylinder as +q and similarly on inner surface of outer cylinder as –q coulombs. In practical +q charge is considere...