Experiments with magnets and our surroundings What is a magnetic field? A magnet produces a vector field, the magnetic field, at all points in the space around it.
Description[ edit ] The magnetic flux through a surface—when the magnetic field is variable—relies on splitting the surface into small surface elements, over which the magnetic field can be considered to be locally constant. The total flux is then a formal summation of these surface elements see surface integration.
Each point on a surface is associated with a direction, called the surface normal ; the magnetic flux through a point is then the component of the magnetic field along this direction. The magnetic interaction is described in terms of a vector fieldwhere each point in space and time is associated with a vector that determines what force a moving charge would experience at that point see Lorentz force.
The magnetic flux through some surface, in this simplified picture, is proportional to the number of field lines passing through that surface in some contexts, the flux may be defined to be precisely the number of field lines passing through that surface; although technically misleading, this distinction is not important.
Note that the magnetic flux is the net number of field lines passing through that surface; that is, the number passing through in one direction minus the number passing through in the other direction see below for deciding in which direction the field lines carry a positive sign and in which they carry a negative sign.This magnetic flux calculator calculates the magnetic flux of an object based on the magnitude of the magnetic field which the object emanates and the area of the object, according to the formula, Φ=BA, if the magnetic field is at a 90° angle (perpendicular) to the area of the object.
If the. Lenz's Law - seeing that the magnetic field induced by a current induced by a change in magnetic flux (Faraday's Law) counteracts the change in flux.
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In physics, specifically electromagnetism, the magnetic flux (often denoted Φ or Φ B) through a surface is the surface integral of the normal component of the magnetic field B passing through that surface. The SI unit of magnetic flux is the weber (Wb) (in derived units: volt ⋅ seconds), and the CGS unit is the monstermanfilm.comic flux is usually measured with a fluxmeter, which contains.