MAGNETISM

Magnetism

1. Magnetic field: A region or a space where a moving charge experiences a force.

2. Magnetic field line: The path taken by a hypothetical north when placed in a magnetic field.

3. Magnetic flux: Total number of magnetic field lines passing through a given area.

4. Transformer: A device that converts alternating emf at one level alternating emf at another, using electromagnetic induction

5. Eddy currents: Small circular currents that oppose the laminar flow of magnetic flux through the soft iron core  (with reference to transformers).

Magnetism Equation:

I = n a v e

When the conductor is perpendicular to the magnetic field

F = BIl

When the conductor is at an angle to the magnetic field

F = BIl sin(theta)

When the current is perpendicular to the magnetic field

F = B q v

When the current is at an angle to the magnetic field