What is the Difference Between Magnetic Flux and Magnetic Flux Density?
🆚 Go to Comparative Table 🆚Magnetic flux and magnetic flux density are related concepts in electromagnetism, but they have distinct meanings:
- Magnetic Flux: This is a measurement of the total number of magnetic field lines passing through a given area. It is represented by the Greek letter ϕ and has no direction, making it a scalar quantity.
- Magnetic Flux Density: Also known as magnetic field strength, this is a measurement of the density of magnetic field lines. It is represented by the symbol B and is another name for the magnetic field strength. Magnetic flux density is a vector quantity, with a magnitude and direction.
The relationship between magnetic flux and magnetic flux density is given by the formula:
$$\phi = B_{||}A = BA\cos{\theta}$$
where:
- $$\phi$$ is the magnetic flux
- $$B_{||}$$ is the component of the magnetic field strength parallel to the surface
- $$A$$ is the area of the surface
- $$\theta$$ is the angle between the magnetic field lines and the normal of the surface
In summary, magnetic flux is a measure of the total magnetic field lines passing through an area, while magnetic flux density is a measure of the strength of the magnetic field lines in a given area.
Comparative Table: Magnetic Flux vs Magnetic Flux Density
Magnetic flux and magnetic flux density are two phenomena encountered in electromagnetic field theory. Here is a table comparing the differences between them:
Feature | Magnetic Flux | Magnetic Flux Density |
---|---|---|
Definition | The total quantity of magnetism passing through a given area. | The amount of magnetic flux through a unit area placed normal to the magnetic field. |
Unit | Webers (Wb). | Webers per square meter (Wb/m²). |
Symbol | φ or ɸ. | B. |
Quantity | Scalar. | Vector. |
Measurement | Cannot be measured directly. Computed using mathematical formulas. | Measured in Teslas (T) or Gauss (G). |
Relationship | Magnetic flux in a given area equals the flux density multiplied by the area (φ = B_ |
In summary, magnetic flux is the total quantity of magnetism passing through a given area, while magnetic flux density is the amount of magnetic flux through a unit area placed normal to the magnetic field. The main difference between these two concepts is that magnetic flux is a scalar quantity, whereas magnetic flux density is a vector quantity.
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