Are the components of electromagnetic fields mutually dependent?

Question

An electromagnetic wave has two major components, the electrical (E) and magnetic (H) fields; are these fields able to be induced separately?

Answer 1

Electromagnetic waves are dynamic or time-varying fields. Since a time-varying electric field produces a time-varying magnetic field and vice-versa, you can't have a time-varying electric field without a time-varying magnetic field. You can observe this mathematically with the Maxwell equations (link below). Notice how you have partial derivatives with respect to time in the curl of the two fields. Thus, if one field is oscillating harmonically (a sine wave), the other must be too. This is an electromagnetic wave.

Answer 2

you can charge an object by apply voltage to it. once charged no magnetic field is present.
a permanent magnet has a magnetic field no electric field is present.

however if you produce a "flow of current" (poor terminology)
in a circuit a magnetic field is present circulating around the conductor.

and if you move a conductor at right angles to the magnetic field of the permanent magnet then it induces a "flow of current" (poor terminology)

both E and H fields are linked by time and movement.

Answer 3

::fully agrees with Drew's answer::