Electrical Capacitance Equations Formulae

Electronics, Instrumentation & Electrical Database

The following are Electrical Capacitance equations for various configurations.

Capacitors C = Q/V [F] (Farads)
Capacitor in Series Capacitor in Series
Capacitors in Parallel Capacitors in Parallel
Charging a Capacitor Charging a Capacitor
Discharging a
Capacitor
Discharging a Capacitor
Capacitance of a
Parallel-plate Capacitor
Capacitance of a Parallel Plate
Isolated Sphere Isolated Sphere
Energy stored in a charged capacitor Energy stored in a charged capacitor
If the capacitor is isolated If the capacitor is isolated
If the capacitor is connected to a battery If the capacitor is connected to a battery
For R C circuits Charging a capacitor For R C circuits Charging a capacitor
Discharging a capacitor Discharging a capacitor
  1. If the capacitor is isolated, the presence of the dielectric decreases the potential difference between the plates.
  2. If the capacitor is connected to a battery, the presence of the dielectric increases the charge stored in the capacitor.
  3. The introduction of the dielectric increases the capacitance of the capacitor