Magnetic Flux Definition
- Electromagnetic induction is when an e.m.f is induced in a closed circuit conductor due to it moving through a magnetic field
- This happens when a conductor cuts through magnetic field lines
- The amount of e.m.f induced is determined by the magnetic flux
- The amount of magnetic flux varies as the coil rotates within the field
- The flux is the total magnetic field that passes through a given area
- It is a maximum when the magnetic field lines are perpendicular to the area
- It is at a minimum when the magnetic field lines are parallel to the area
- The magnetic flux is defined as:
The product of the magnetic flux density and the cross-sectional area perpendicular to the direction of the magnetic flux density
Maximum and minimum magnetic flux
The magnetic flux is maximum when the magnetic field lines and the area they are travelling through are perpendicular
- In other words, magnetic flux is the number of magnetic field lines through a given area