# Magnetic Field B Flux Through a Surface Explained

• ghostbuster25
In summary, the flux of a magnetic field B through a surface is the strength of the magnetic field over a given area A and is given by the equation magnetic flux=A*B. When the field is NOT perpendicular to the plane, it is given by the inclined angle to the perpendicular and is calculated using the equation A*Bcos(theta). This definition is sufficient for a level 2 course, but for a more complete understanding, factors such as the shape of the surface and changes in the magnetic field's magnitude and direction should also be considered.

#### ghostbuster25

I have been asked to explain what is meant by 'the flux of a magnetic field B through a surface' and to include the case where the field is NOT perpendicular to the plane of the surface.

This seems quite simple but i just wanted to check my definition with you guys

I have;

The flux of a magnetic field B through a surface is the the strength of the magnetic field over a given area A and is given by the equation magnetic flux=A*B

Where the field is NOT perpendicluar to the plane it is given by the inclined angle to the perpendicular and given by the equation A*Bcos(theta)

Is that pretty much it?
Hope so :)

## The Attempt at a Solution

That's OK, you are not saying anything incorrect. I am not sure though how complete your answer must be. For example, what happens when the surface is not a plane or when the magnetic field changes magnitude and/or direction from one point of the surface to the next. To get a better picture see the wikipedia article

http://en.wikipedia.org/wiki/Magnetic_flux

The quation just says; Expalin what is meant by"'the flux of a magnetic field B through a surface' Include the case where the magnetic field is NOT perpendicular to the plane of the surface.
Its a level 2 course

You are fine with what you have then.

## 1. What is a magnetic field?

A magnetic field is an area of space surrounding a magnet or electric current where magnetic forces are exerted on other objects. It is created by moving electric charges and is represented by lines of force called magnetic field lines.

## 2. How is the magnetic field strength measured?

The strength of a magnetic field is measured in units called tesla (T) or gauss (G). One tesla is equal to 10,000 gauss. The strength of a magnetic field can be measured using a device called a magnetometer.

## 3. What is magnetic flux?

Magnetic flux is a measure of the number of magnetic field lines passing through a given area. It is represented by the symbol Φ and is measured in units of webers (Wb). It is a useful concept in understanding the behavior of magnetic fields.

## 4. How is the magnetic flux through a surface calculated?

The magnetic flux through a surface is calculated by multiplying the strength of the magnetic field by the area of the surface, and then taking the component of the field that is perpendicular to the surface. This can be represented mathematically as Φ = B*A*cos(θ), where B is the magnetic field strength, A is the area, and θ is the angle between the magnetic field lines and the surface.

## 5. What factors affect the magnetic flux through a surface?

The magnetic flux through a surface is affected by the strength of the magnetic field, the area of the surface, and the angle between the magnetic field lines and the surface. It is also affected by the material of the surface, as different materials can have different magnetic permeability, which affects the way the magnetic field passes through them.