# What is magnetic flux density GCSE?

Contents

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.

IT IS INTERESTING:  What is the capacity of magnetic storage?

## 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.