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[[/Magnetic field]] effects depend on [[/frame of reference]]: upper image show the [[/wire]] (grey) with the [[/electric charge|electric positive charges]] as stationary and the negative charges moving - the [[/magnetic force]] //Fm// pushes the single moving charge towards the wire, in the bottom image the frame of reference is such that the moving charge is stationary - the magnetic force disappears and the negative charge is pushed towards the wire due to [[/electrostatic force]] //Fe//.

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{{tag> Electric_charges Relativistic_effects Special_theory_of_relativity Positive_charges Negative_charges Wire Magnetic_force Electrostatic_force Electromagnetic_force Lorentz_force Moving_charge Files}}