Magnetic Flux


  1. When a current-carrying conductor is placed in a magnetic field, it experiences a force.
  2. The magnitude of the force is directly dependent on the current in the wire and the strength of the magnetic field.
  3. The force will be greatest when the magnetic field is perpendicular to the conductor.

As shown in the image, the source of the magnetic field is a bar magnet. Flux lines are simply lines that indicate the direction along which

iron filings (or small steel pins) would align themselves when placed in the field of the bar magnet.

The dotted lines in the figure are referred to as magnetic flux lines. If we observe flux lines in a bar magnet, they are continuous, without a

start’ or ‘finish’.