![]() ![]() This phenomenon is known as electromagnetic induction. Λ e for Linear, σ e for surface, ρ e for volume. Faraday’s law of electromagnetic induction, also known as Faraday’s law, is the basic law of electromagnetism which helps us predict how a magnetic field would interact with an electric circuit to produce an electromotive force (EMF). Linear, surface, volumetric charge density Gauss's Law is a general law applying to any closed surface. The electric flux through an area is defined as the electric field multiplied by the area of the surface projected in a plane perpendicular to the field. Position vector r is a point to calculate the electric field r′ is a point in the charged object.Ĭontrary to the strong analogy between (classical) gravitation and electrostatics, there are no "centre of charge" or "centre of electrostatic attraction" analogues.Įlectric transport Quantity (common name/s) The total of the electric flux out of a closed surface is equal to the charge enclosed divided by the permittivity. The volume charge density ρ is the amount of charge per unit volume (cube), surface charge density σ is amount per unit surface area (circle) with outward unit normal n̂, d is the dipole moment between two point charges, the volume density of these is the polarization density P. Electric flux is measured in Coulombs C, and surface area is measured in square meters ( m2 m 2 ). Electric flux density is represented as D, and its formula is DE. Initial quantities Quantity (common name/s)Įlectric quantities Continuous charge distribution. The number of electric field lines or electric lines of force flowing perpendicularly through a unit surface area is called electric flux density. Dimensional analysis shows that magnetic charges relate by q m(Wb) = μ 0 q m(Am). The Formula for Electric flux: The total number of electric field lines passing through a given area in a unit time is the electric flux. There are two possible units for monopole strength, Wb (Weber) and A m (Ampere metre). The definitions for monopoles are of theoretical interest, although real magnetic dipoles can be described using pole strengths. Here subscripts e and m are used to differ between electric and magnetic charges. This article summarizes equations in the theory of electromagnetism.ĭefinitions Lorentz force on a charged particle (of charge q) in motion (velocity v), used as the definition of the E field and B field. ![]()
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