What is Magnetic Flux Density?
The magnetic flux density or magnetic induction is the number of magnetic lines of force passing through a unit area of material A . The unit of magnetic induction is the tesla (T).
Magnetic induction is a vector characterizing a magnetic field. The force acting on a moving charge in a magnetic field is the charge multiplied by the vector product of the velocity and magnetic flux density. This quantity is sometimes loosely called the magnetic field.