Parallel Plate Capacitor
Calculate capacitance of parallel plate capacitor
Formula:
C = ε0εr(A/d)
Where:
- C = Capacitance (F)
- ε0 = 8.854×10-12 F/m
- εr = Dielectric constant
- A = Plate area (m²)
- d = Plate separation (m)
Results:
Capacitance: 0 F
Equivalent to:
- 0 µF
- 0 nF
- 0 pF
Stored Charge: 0 C
Stored Energy: 0 J
Cylindrical Capacitor
Calculate capacitance of cylindrical capacitor
Formula:
C = 2πε0εrL / ln(b/a)
Where:
- C = Capacitance (F)
- ε0 = 8.854×10-12 F/m
- εr = Dielectric constant
- L = Length (m)
- a = Inner radius (m)
- b = Outer radius (m)
Results:
Capacitance: 0 F
Equivalent to:
- 0 µF
- 0 nF
- 0 pF
Spherical Capacitor
Calculate capacitance of spherical capacitor
Formula:
C = 4πε0εr / (1/a - 1/b)
Where:
- C = Capacitance (F)
- ε0 = 8.854×10-12 F/m
- εr = Dielectric constant
- a = Inner radius (m)
- b = Outer radius (m)
Results:
Capacitance: 0 F
Equivalent to:
- 0 µF
- 0 nF
- 0 pF
Series & Parallel Combinations
Calculate total capacitance for series or parallel combinations
Series Combination Formula:
1/Ctotal = 1/C1 + 1/C2 + ... + 1/Cn
Where:
- Ctotal = Total capacitance
- C1, C2, ..., Cn = Individual capacitances
Results:
Total Capacitance: 0 F
Equivalent to:
- 0 µF
- 0 nF
- 0 pF
Parallel Combination Formula:
Ctotal = C1 + C2 + ... + Cn
Where:
- Ctotal = Total capacitance
- C1, C2, ..., Cn = Individual capacitances
Results:
Total Capacitance: 0 F
Equivalent to:
- 0 µF
- 0 nF
- 0 pF
Charge & Energy Calculator
Calculate charge, voltage, or energy from known values
Formulas:
Q = CV
E = ½CV² = ½QV
Where:
- Q = Charge (Coulombs)
- C = Capacitance (Farads)
- V = Voltage (Volts)
- E = Energy (Joules)
About Capacitance
Capacitance is the ability of a system to store an electric charge. It is defined as the ratio of the change in electric charge to the corresponding change in electric potential.
The SI unit of capacitance is the farad (F), named after the English physicist Michael Faraday.
- Parallel Plate Capacitor: Two parallel conducting plates separated by a dielectric.
- Cylindrical Capacitor: Two coaxial cylinders with dielectric between them.
- Spherical Capacitor: Two concentric spherical conductors with dielectric between them.
- Electrolytic Capacitor: Polarized capacitors with high capacitance values.
- Ceramic Capacitor: Small, non-polarized capacitors for high-frequency applications.
- Energy storage in flash photography
- Power conditioning in power supplies
- Noise filtering in electronic circuits
- Tuning radio frequencies
- Motor starters in HVAC systems
- Memory backup in computers
- Signal coupling and decoupling
| Type | Formula |
|---|---|
| Parallel Plate | C = ε0εr(A/d) |
| Cylindrical | C = 2πε0εrL / ln(b/a) |
| Spherical | C = 4πε0εr / (1/a - 1/b) |
| Series | 1/Ctotal = 1/C1 + 1/C2 + ... |
| Parallel | Ctotal = C1 + C2 + ... |