SI unit of Electric Flux is volt-meter (V⋅m). Electric flux is a concept in electromagnetism that describes the flow of an electric field through a given area. It is a measure of the amount of electric field that penetrates a surface or the number of electric field lines passes through that surface.

In this article, we will learn about the basics of electric flux, its SI unit, and the conversion between various units of electric flux.

Electric Flux Definition

Electric flux is the measure of electric field lines passing through a given closed surface. It is a scalar quantity, representing the total number of electric field lines passing through a given surface.

Formula of Electric Flux

Electric flux depends on the strength of the electric field lines, the area of the surfaces, and the orientation between the surface area and the electric field lines. The formula to calculate electric flux is given as:

Φ = E • A

OR

Φ = E A cos θ

Where,

• Φ denotes the electric flux,
• E denotes the electric field strength,
• A denotes the area of the closed surface, and
• θ denotes the angle between the electric field lines and the area vector

Unit of Electric Flux

The unit of electric flux can be derived by putting the units of different values in the formula for calculating electric flux.

Φ = E × A × cos θ

Therefore,

Unit of (Φ) = Unit of (E) × Unit of (A) × Unit of cos θ

OR Unit of (Φ) = (V/m) × (m²) × 1

OR Unit of (Φ) = V-m.

Thus, the unit of electric flux is V-m (Volt-meter).

The unit of electric flux is volts times meters (V⋅m) which is equivalent to newton meters squared per coulomb (Nm²/C).

Definition of 1 Volt-Meter

One volt-meter (V⋅m) corresponds to the amount of electric flux passing through a unit area (1 square meter) perpendicular to an electric field with a magnitude of 1 volt per meter.

Dimensional Formula of Electric Flux

Dimensional formula for the electric flux is [M¹L³T⁻³A^-1]

Where:

• M represents Mass,
• L represents Length and,
• T represents Time

SI Unit of Electric Flux

SI unit of electric flux is the volt-meter (V⋅m) or, equivalently, the newton-meter squared per coulomb (N⋅m²/C). This unit represents the amount of electric field passing through a given area.

Electric flux is a measure of the electric field through a surface, and it quantifies how much electric field penetrates a surface. It is a fundamental concept in electromagnetism and plays a crucial role in understanding phenomena like Gauss Law and electric field behavior around charged objects.

SI unit of electric flux is the volt-meter (V⋅m) or newton-meter squared per coulomb (N⋅m²/C).

CGS Unit of Electric Flux

CGS Unit of Electric Flux is dyne cm²/franklin.

Unit of Electric Flux in Other Systems

The unit of electric flux in other systems is described below: