Page "Electromagnetic field" Paragraph 10

Once this electromagnetic field has been produced from a given charge distribution, other charged objects in this field will experience a force ( in a similar way that planets experience a force in the gravitational field of the Sun ).

If these other charges and currents are comparable in size to the sources producing the above electromagnetic field, then a new net electromagnetic field will be produced.

Thus, the electromagnetic field may be viewed as a dynamic entity that causes other charges and currents to move, and which is also affected by them.

These interactions are described by Maxwell's equations and the Lorentz force law.

( This discussion ignores the radiation reaction force.