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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

A 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
Îµ0 â€“ vacuum permittivity, Îµ0 = 8.85418781762039 Ã— 10-12
Îµ â€“ 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 Îµ =
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

A 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 Îµ.

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

Q - electric charge
Ï€ â€“ the number Pi (3.1415926535897932384626433832795â€¦)
Îµ0 â€“ vacuum permittivity, Îµ0 = 8.85418781762039 Ã— 10-12
Îµ â€“ permittivity of dielectric
l â€“ length of the cylinder
ln â€“ natural logarithm

The SI unit of voltage is volt (V).
Permittivity Îµ =
Electric charge Q =
Length l =
The SI unit of voltage U

Voltage (Potential Difference) of Spherical Capacitor Calculator

A 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 Îµ.

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

Q - electric charge
Ï€ â€“ the number Pi (3.1415926535897932384626433832795â€¦)
Îµ0 â€“ vacuum permittivity, Îµ0 = 8.85418781762039 Ã— 10-12
Îµ â€“ permittivity of dielectric