Flux Reversal

[Burnit]

Hello,

When an Inductor is disconnected from a power supply does the magnetic field produced by it reverse in polarity like the voltage does?

If so what Law describes this?

 

[waross]

The flux decays, it does not reverse.
The current tends to continue flowing in the same direction.
The voltage is in the same direction and is the product of the instantaneous current and the instantaneous impedance.


Bill
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"Why not the best?"
Jimmy Carter

 

[Burnit]

Thanks waross,

The Flyback voltage is of reverse polarity is it not?

 

[Skogsgurra]

Yes. If supplied with a positive voltage, the kickback will be negative. Quite often (if there are capacitors in the circuit) it will also oscillate. But it always starts negative.

Gunnar Englund

http://www.gke.org

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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

 

[Burnit]

Thanks Skogsgurra,

That's what i thought.