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# DC vs. AC magnetic waves

## DC vs. AC magnetic waves

(OP)
Is there any difference as to how a DC magnetic wave effect the relative permeability of an alloy, compared to an AC magnetic wave?

### RE: DC vs. AC magnetic waves

Yes

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

(OP)
in which way?

### RE: DC vs. AC magnetic waves

It depends on the magnetic properties of the alloy, and the frequency and intensity of the field.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

### RE: DC vs. AC magnetic waves

All else equal, DC relative permeability is always bigger than AC perm.

### RE: DC vs. AC magnetic waves

"DC magnetic wave effect"? In what sense?

### RE: DC vs. AC magnetic waves

If it's steady state (DC) there is no wave, there is no transient. Thus resistivity is unimportant to the magnetic field. For AC and transient fields there will be resistivity and skin effects.

Sounds like you need a basic physics course, try this, it's free:

https://ocw.mit.edu/courses/physics/8-02-physics-i...

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