Physics

Effects of a magnetic field on charges


As electrons and protons have magnetic characteristics, when exposed to magnetic fields, interact with it, being subjected to a magnetic force. .

Assuming:

  • stationary magnetic fields, meaning that the magnetic field vector at each point does not vary with time;
  • particles with an initial velocity at the moment of interaction;
  • and that the magnetic field vector in the adopted frame is ;

We can establish at least three results:

Electric charge at rest

"A stationary magnetic field does not interact with resting loads."

Having a Magnet set on an arbitrary frame Rif a charged particle what If it is abandoned in its vicinity at zero speed, no magnetic force will appear on this particle, whether positive, negative or neutral.

Electric charge with speed in the same direction as the field

"A stationary magnetic field does not interact with charges that have nonzero velocities in the same direction as the magnetic field."

Whenever a charge moves in the same direction as the magnetic field, either in its direction or in the opposite direction, there is no appearance of electromagnetic force acting on it. An example of this movement is a charge that moves between the poles of a magnet. The validity of this statement is assured regardless of the sign of the load studied.