Magnetic Lines
- Magnetic lines of force are imaginary lines that are used to describe the direction of a magnetic field.
- These lines represent the flow of magnetic field and are drawn in such a way that they form closed loops and never intersect or cross each other.
- They start from the north pole of a magnet and flow towards the south pole.
Magnetic Induction
- Magnetic induction (also called magnetic flux density) is a measure of the strength of a magnetic field.
- It is defined as the amount of magnetic field passing through a unit area perpendicular to the direction of the magnetic field.
- The unit of magnetic induction is the tesla (T).
The formula for magnetic induction is given by:
B = μ * H
Where:
- B is the magnetic induction in tesla (T),
- μ is the permeability of the medium, and
- H is the magnetic field strength in ampere-turns per meter (A-t/m).