Posted by Dean Kukral [ 66.82.9.43 ] on March 20, 2004 at 23:29:25:
In Reply to: Re: How is this possible? posted by Wayne Parham on March 20, 2004 at 22:27:26:
If I remember my physics [and it has been a long time :( ], I don't think that "Inductors are coils," is quite true. ("Coils are inductors," is correct.) Any time current flows into a wire, a magnetic field develops around the wire. The only difference between a straight wire and a curved wire is that the curved wire concentrates the magnetic field and provides mutual self-inductance to the wires which are now side by side.
That is why I said that I don't see how a changing current in a wire (or whatever they use?) can be a purely resistive load. Perhaps the inductance is considered negligible compared to that of a voice coil.
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