Electromagnetic induction

Need to know

What you need to know

• $\Phi$ is the magnetic flux (in Webers, Wb).
• B is the magnetic flux density (in Tesla, T).
• A is the area through which the field lines pass (in m²).
• $\theta$ is the angle between the magnetic field B and the normal to the area A.
• Maximum flux occurs when the field is perpendicular to the area ($\theta = 0^\circ$, $\cos 0^\circ = 1$), so $\Phi = BA$.
• Zero flux occurs when the field is parallel to the area ($\theta = 90^\circ$, $\cos 90^\circ = 0$).

Explanation

Electromagnetic induction

1. $\Phi$ is the magnetic flux (in Webers, Wb).
2. B is the magnetic flux density (in Tesla, T).
3. A is the area through which the field lines pass (in m²).
4. $\theta$ is the angle between the magnetic field B and the normal to the area A.