# What is magnetic flux density GCSE?

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To calculate the strength of a magnetic force on a wire you must find the magnetic flux density . This is measured in a unit called tesla. … The equation for calculating the force on a wire is Force (N) = magnetic flux density (T) × current (A) × length (m) or, in short F = B I L.

## What is magnetic flux density?

magnetic flux density. A vector quantity measuring the strength and direction of the magnetic field around a magnet or an electric current. Magnetic flux density is equal to magnetic field strength times the magnetic permeability in the region in which the field exists.

## What is magnetic flux in simple words?

Magnetic flux is a measurement of the total magnetic field which passes through a given area. It is a useful tool for helping describe the effects of the magnetic force on something occupying a given area. The measurement of magnetic flux is tied to the particular area chosen.

## What is magnetic flux and its unit?

In electromagnetism, a sub-discipline of physics, the magnetic flux through a surface is the surface integral of the normal component of the magnetic field (B) passing through that surface. It is denoted by Φ or ΦB. The CGS unit is the Maxwell and SI unit of magnetic flux is the Weber (Wb).

## How do you work out magnetic flux density?

property>magnetic flux density

Mathematically it is represented as B = Φ/A where B is magnetic flux density in teslas (T), Φ is magnetic flux in webers (Wb), and A is area in square meters (m2). The SI unit for magnetic flux density is the tesla which is equivalent to webers per square meter.

## What is flux density formula?

Flux density is simply the total flux divided by the cross sectional area of the part through which it flows – B = Φ / Ae teslas. Thus 1 weber per square metre = 1 tesla. Flux density is related to field strength via the permeability. B = μ × H.

## What is motional EMF?

About Transcript. An emf induced by motion relative to a magnetic field is called a motional emf. This is represented by the equation emf = LvB, where L is length of the object moving at speed v relative to the strength of the magnetic field B.

## What is called Flux?

Flux is the presence of a force field in a specified physical medium, or the flow of energy through a surface. In electronics, the term applies to any electrostatic field and any magnetic field . Flux is depicted as “lines” in a plane that contains or intersects electric charge poles or magnetic poles.

## What is magnetic flux made of?

Magnetic flux is what generates the field around a magnetic material. It consists of photons, however, unlike the light we receive from the Sun, it is at a much lower frequency. (1) This is why magnetic field lines are not visible to the naked eye.

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## Is magnetic flux always 0?

While the magnetic flux through a closed surface is always zero, the magnetic flux through an open surface need not be zero and is an important quantity in electromagnetism.

## What is the basic cause of induced emf?

Magnetic Effects of Electric Current

The basic cause of induced emf is the change of magnetic flux linked with a closed circuit.

## What is the equation for magnetic flux?

In the most general form, magnetic flux is defined as ΦB=∬AB⋅dA Φ B = ∬ A B ⋅ d A . It is the integral (sum) of all of the magnetic field passing through infinitesimal area elements dA.

## How is magnetic flux created?

When a magnet is moved into a coil of wire, changing the magnetic field and magnetic flux through the coil, a voltage will be generated in the coil according to Faraday’s Law. … The induced magnetic field inside any loop of wire always acts to keep the magnetic flux in the loop constant.

## What is the flux density at a point 3 cm?

Answer: 4.69*10^-5.

## What is the unit of flux density?

The International System (SI) unit of field “magnetic flux density” is the tesla (T). A magnetic field of one tesla is relatively strong. That is why magnetic fields are also expressed in militesla (mT) and microtesla (µT).

## When magnetic flux is maximum?

The magnetic flux through the plane of the coil has its maximum value when this plane is perpendicular to the magnetic field lines between the poles. As the coil turns and the plane of the coil becomes parallel to the field lines, the flux becomes zero.

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