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Voltage (Potential Difference) of a Capacitor. Online Calculator.

An online calculator for calculating the voltage of a capacitor helps you to calculate the voltage U of flat (parallel-plate capacitor), cylindrical and spherical capacitors and gives a detailed solution. Units of measurement can include any SI prefixes. The calculator automatically converts one SI prefix to another.

Calculator calculates:
Voltage of a parallel-plate capacitor.
Voltage of a cylindrical capacitor.
Voltage of a spherical capacitor.


Voltage (Potential Difference) of Parallel Plate Capacitor Calculator

Voltage (Potential Difference) of Parallel Plate Capacitor CalculatorA parallel plate capacitor consists of two parallel conducting plates separated by a dielectric, located at a small distance from each other.

Voltage (potential difference) of a parallel plate capacitor is determined by the formula, where

Q - charge on the plate
ε0 – vacuum permittivity, ε0 = 8.85418781762039 × 10-12
ε – permittivity of dielectric
S - Area of one plate (it is assumed that the plates are the same)
d - the distance between the plates

The SI unit of voltage is volt (V).
Permittivity ε =
Electric charge Q =
Separation between the plates d =
Area of one plate (it is assumed that the plates are the same) S =
The SI unit of voltage U

Voltage (Potential Difference) of Cylindrical Capacitor Calculator

Voltage (Potential Difference) of Cylindrical Capacitor CalculatorA cylindrical capacitor is a capacitor, the plates of which are two cylinders, the inner one with the radius R1 and the outer one with the radius R2. Between the plates there is a dielectric whose permittivity is ε.

Voltage (potential difference) of a cylindrical capacitor is determined by the formula, where

Q - electric charge
π – the number Pi (3.1415926535897932384626433832795…)
ε0 – vacuum permittivity, ε0 = 8.85418781762039 × 10-12
ε – permittivity of dielectric
l – length of the cylinder
ln – natural logarithm
R1 – inner radius
R2 – outside radius

The SI unit of voltage is volt (V).
Permittivity ε =
Electric charge Q =
Radius R1 =
Radius R2 =
Length l =
The SI unit of voltage U

Voltage (Potential Difference) of Spherical Capacitor Calculator

Voltage (Potential Difference) of Spherical Capacitor CalculatorA spherical capacitor is a capacitor whose plates are two concentric spheres with radii R1 and R2, between which there is a dielectric whose permittivity is ε.

Voltage (potential difference) of a spherical capacitor is determined by the formula, where

Q - electric charge
π – the number Pi (3.1415926535897932384626433832795…)
ε0 – vacuum permittivity, ε0 = 8.85418781762039 × 10-12
ε – permittivity of dielectric
R1 – inner radius
R2 – outside radius

The SI unit of voltage is volt (V).
Permittivity ε =
Electric charge Q =
Radius R1 =
Radius R2 =
The SI unit of voltage U

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