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# Magnetic Flux- Definition, Density, Formula, SI Unit

## Magnetic flux

The entire magnetic field that travels across a particular area is measured by magnetic flux. It’s a helpful tool for describing the effects of magnetic force on things in a specific location. The magnetic flux measurement is specific to the designated location.We can make the region any size and orient it in any direction in relation to the magnetic field.
If we consider a magnetic field in terms of field lines, each field line travelling through a particular area adds some magnetic flux. It’s also crucial to consider the angle at which the field line meets the region. A glancing angle field line will only contribute a small portion of the field to the magnetic flux. We only use the component of the magnetic field vector that is normal to our test region when computing the magnetic flux.

## Magnetic flux- Definition

The magnetic flux through a material is the surface integral of the real part of the magnetic field B over the same surface in Physics, specifically electromagnetism. It is commonly indicated by the symbols Φ or ΦB. The weber is the SI unit for magnetic flux, while the maxwell is the CGS unit. Magnetic flux is typically measured with a fluxmeter, which consists of measuring coils and electronics that calculate magnetic flux measurement by evaluating the change in voltage in the measuring coils.

The field line analogy is eliminated in more sophisticated physics, and the magnetic flux is properly defined as the surface integral of the normal component of the magnetic field travelling through a surface.

## Magnetic flux- Formula

The magnetic flux traveling through a surface of vector area S is constant if the magnetic field is constant is:

 Φ B = B ⋅ S = B S cos ⁡ θ

in which B is the magnetic field’s magnitude, θ is the angle between the magnetic field lines and its perpendicular, and S is the surface area.

## Magnetic flux- Density

Magnetic Flux Density is the quantity of magnetic flux per unit area measured perpendicular to the magnetic flux direction. Magnetic Field and Flux Density are interrelated by

 B=μH

Magnetic flux refers to the total number of magnetic field lines that travel through a specific location. The permeability of the medium (μ) in which we are measuring the fields is the permeability in the magnetic flux formula. The B field is a vector field, meaning it has a magnitude and direction at every point in space.

The total number of magnetic field lines passing through a given area normally is called magnetic flux. In magnetic flux formula μ is the permeability of the medium (material) where we are measuring the fields. The B field is a vector field, which means it has a magnitude and direction at each point in space.

## Magnetic flux- Density Formula and SI unit

The magnetic flux travelling through a surface of vector area S is constant if the magnetic field is constant is:

 Φ B = B ⋅ S = B S cos ⁡ θ

in which B is the magnetic field’s magnitude, θ is the angle between the magnetic field lines and its perpendicular, and S is the surface area.

The magnetic field’s magnitude (the magnetic flux density) is measured in Wb/m2 (tesla),

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## Magnetic flux- FAQs

What is magnetic flux equal to?

Magnetic flux is defined as B=ABdA in its most general form.

ΦB=∬AB⋅dA Φ B = ∬ A B ⋅ d A

It’s the total of all magnetic fields flowing across dA elements of microscopic area.

What is magnetic flux example?

The total number of magnetic field lines passing through a coil or region is known as magnetic flux. It is the component of the magnetic field that travels through the coil that is most prevalent. B denotes magnetic flux, where B denotes a magnetic field and Weber denotes its unit Wb.

WHat is the use of magnetic flux?

The entire magnetic field that travels across a particular region is measured by magnetic flux. It’s a helpful tool for describing the effects of magnetic force on things in a specific location.

How is magnetic flux produced?

Any induced current in a coil produces a magnetic flux that is the polar opposite of the changing flux. The induced current creates a north pole pointing toward the magnet’s north pole when directed toward a conducting loop. This provides a repellent force that opposes the current-causing change.

Is magnetic flux a dot product?

The magnetic flux is defined as the product of the magnetic field, the area, and the cosine of the angle between these two vectors by the dot product. The idea of magnetic flux is used by Faraday’s Law of electromagnetic induction to define the emf induced inside a conducting wire.

What is difference between electric and magnetic field?

The magnetic field lines form a closed loop, whereas the electric field lines do not. The intensity of the magnetic field is proportional to the number of field lines produced by the magnet, whereas the electric field is proportional to the flux.

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