Magnetic Fields and Motors

Revision card on magnetic fields and motors

  • Created by: Chris
  • Created on: 10-04-13 17:17

Magnetic Fields and Motors

-If the current is PARALLEL to the lines of flux, NO force acts

-The direction of the force is always PERPENDICULAR to both the CURRENT direction and the MAGNETIC FIELD

-Use Flemings Left hand rule to get the direction of the force

First finger = direction of uniform magnetic Field N-->S

seCond finger = direction of Current

thuMb = direction of Motion of force

The size of the force is given by F=BIL


B=Strength of magnetic field


L=Length of wire

Magnetic Field strenth is also called FLUX DENSITY

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