"Brian Reay" wrote in message
...

You are confusing a rotating magnetic field with one which is changing
due to an alternating current producing it.

It is a frequent sneer of yours that some subject or other is taught in the
first
couple of years at secondary school, and yet you are setting yourself up
as the target for such a sneer by making comments such as that quoted above.

In AC motors you can have both; a rotating magnetic field produced by
alternating
currents.

Magnetic fields are universally the same and do not "care" whatever was the
agency
that creates them