by the way.. I forgot to add a fourth, for me important question:

4) Is an alternate magnetic field equivalent to an electromagnetic
   field? I mean, if I take a natural magnet and rotate it around
   its axis 1 millions of times per second, would that make it an
   1 MHz unmodulated radio transmitter?

Thanks!
N.R.


>Hi,
>I'd like to understand more intuitively the subject.
>
>First of all, I've the following questions to ask, if you don't mind:
>
>1) A transformer and a system composed by a radio transmitter and a
>   radio receiver use the same underlying physical phenomena?
>
>2) Does magnetism really exist in itself, or is it just electricity
>   that manifests itself into a particular way? What is it (this way)?
>
>3) If an electrical static field starts changing (e.g. sinusoidally),
>   i.e. it stops being static, is it enough to call it an electromagnetic
>   field?
>
>Thanks!
>N.R. 

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