Question: Derive the capacitance for a)a parallel plate capacitor with cross sectional area A and plate separation d b)a cylindrical capacitor with inner conductor radius a

Derive the capacitance for

a)a parallel plate capacitor with cross sectional area A and plate separation d

b)a cylindrical capacitor with inner conductor radius a and outer conductor radius b and length l(where l>>b-a),

c) a spherical capacitor with inner conductor radius a and outer conductor radius b.show in the later two cases that the capacitance is approximately C=E0A/d where A is the area of the cylinder and d=b-a<

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