Electricity & Magnetism
Electric Flux
Electric flux through a surface.
Variables
Φ_EV·m
Electric flux
Flux through surface
EN/C
Electric field
Field strength
Am²
Area
Surface area
θ°
Angle
Between E and normal
Derivation
Φ = ∫E·dA. For uniform field: Φ = EA cos θ.
Your notes
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Common questions
What is the Electric Flux formula?
Electric Flux is written Φₑ = EAcosθ. Electric flux through a surface. It belongs to Electricity & Magnetism, under Electrostatics.
What are the units in Φₑ = EAcosθ?
In SI units, Φ_E is electric flux, measured in kg·m³/(A·s³); E is electric field, measured in kg·m/(A·s³); A is area, measured in m²; θ is angle, measured in rad.
How is the Electric Flux formula derived?
Φ = ∫E·dA. For uniform field: Φ = EA cos θ. The result is Φₑ = EAcosθ.