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Electric Field Strength in a Capacitor. Online Calculator.

An online calculator for calculating the strength of the electric field in a capacitor helps you to calculate the strength E in 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:
Electric field strength in a parallel-plate capacitor.
Electric field strength in a cylindrical capacitor.
Electric field strength in a spherical capacitor.


Electric Field Strength in a Parallel Plate Capacitor Calculator

Electric Field Strength in a 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.

In a parallel plate capacitor, the electric field E is uniform and does not depend on the distance d between the plates, since the distance d is small compared to the dimensions of the plates.

The electric field strength in 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)

The SI unit of electric field strength is volt (V).
Permittivity ε =
Electric charge Q =
Area of one plate (it is assumed that the plates are the same) S =
The SI unit of electric field strength E

Electric Field Strength in a Cylindrical Capacitor Calculator

Electric Field Strength in a 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.

The electric field strength in 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
r is the distance from the axis of symmeters of the cylinders to the point at which it is necessary to find the electric field strength. It is important R1 < r < R2, since in the region from the center of the capacitor to R1, and also in the region exceeding R2, there are no charges and the field is zero.

The SI unit of electric field strength is volt (V).
Permittivity ε =
Electric charge Q =
Radius r =
Length l =
The SI unit of electric field strength E

Electric Field Strength in a Spherical Capacitor Calculator

Electric Field Strength in a 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.

The electric field strength in 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
r is the distance from the axis of symmeters of the cylinders to the point at which it is necessary to find the electric field strength. It is important R1 < r < R2, since in the region from the center of the capacitor to R1, and also in the region exceeding R2, there are no charges and the field is zero.

The SI unit of electric field strength is volt (V).
Permittivity ε =
Electric charge Q =
Radius r =
The SI unit of electric field strength E

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