Flux

Flux refers how much a vector field intersects through a given area. The word flux is Latin for flow, so it represents how much a field flows through a given area.

Generally, the symbol of flux is capital Phi ($\Phi$). Flux can refer to:

• Electric Flux
• Magnetic Flux

Definition §

Formula - 1 §

Flux on an Area

\Phi_Q = \vec{V}_{Q}\cdot\vec{A}

Formula - 2 §

Flux on a Surface

$${\Phi }_Q=\oint {\vec{V}}_Q\cdot \text{d}\vec{A}$$

Note

• ${\Phi }_Q$ = Flux, dependant on the physical quantity * ${\Phi }_E$ = Electric Flux * ${\Phi }_B$ = Magnetic Flux

• ${\vec{V}}_Q$ = A vector field, representing a physical quantity ($Q$). It can be anything, for example for magnetic flux, it is the Magnetic Field, while for electric flux it is the Electric Field.