Capacitors
- Stores charge (Current)
- supplies it if it has some stored
- Capacitance (
) in Farads ( ) - Also
, where is the dielectric permittivity - Coulomb's Constant
- The permittivity of free space is
- The current flowing through a capacitor is
- Energy stored in a capacitor
(take power and integrate) leads by and - ICE
Parallel Plate Capacitor
- put two metal plates with area A in parallel, with an insulator of thickness d in between
- Now stick voltage across the plates
Equivalent Capacitors
- It's kinda like the reverse of resistors
- Capacitors in series have the same charge
- Also
- Also
- Parallel capacitors