What is an electric field? Which electric fields are called electrostatic and which are external?

An electric field is a special type of matter, which is detected by the forceful action on an electrically charged body. This action depends on the charge of the body, but does not depend on the speed of its movement. An electrostatic field is an electric field generated by charges that are stationary relative to the selected IFR. External electric fields are electric fields generated by anything other than charges at rest relative to the selected inertial reference frame.

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