1. Electrostatic Energy and Capacitors

2. Capacitance An indication as to how easy it is to accumulate charge on an object. Ex. What is the capacitance of a device if 0.141 C of charge accumulates on it when 30 V is applied across it? Units 1C/V = 1 F (farad)

3. Charged Sphere Place + charge on sphere and the corresponding  charge is at infinity. Ex. What radius is required for a sphere to have a capacitance of 4700  F?

4. Parallel Plates Ex. What dimensions must a square plate capacitor have if it is to have a capacitance of 4700  F when the gap between the plates is 1mm? d

5. Combinations Capacitors in Parallel Capacitors in Series C1C1 C2C2 C1C1 C2C2

6. Work and Energy Move a small amount of +charge from the  plate to the + plate. VV Q QQ Energy density in an E field

7. Dielectrics A nonconducting material placed between conductors to increase capacitance. Ex. What dimensions must a square plate capacitor have if it is to have a capacitance of 4700  F when the gap between the plates is 0.1mm and paper is between them? (dielectric constant for paper is 3.7) Dielectric strength (paper - 16 MV/m)