If the motion of electron causes magnetism then in AC current what happens since electrons reverse direction ?

Answer 1

The magnetic field reverses direction as well. Use the right hand rule to prove this to yourself:

In a straight wire:
If your thumb is pointing in the direction of the current, your fingers indicate the direction of the magnetic field, circular around the wire. If your hand is pointing in the opposite direction, your fingers also point in the opposite direction.

In a solenoid/inductor:
The same principal applies, except you have to consider the additive effects of the overlapping magnetic fields. The resultant magnetic field should have a direction through the solenoid, and back around it, with it's direction depending on the current direction.

In AC, not only does the direction of the field change, but the magnitude changes. At the positive and negative peak currents, the magnetic field magnitude is maximum, At the point in the cycle where the current in 0, the magnetic field is also zero.

Answer 2

I expect you are going to find that the current yet moves in a single direction, even though the field about it forms, collapses, and then appears to change direction. Were there not a singular direction of current, then an AC circuit could form and would remain in that state - like a super-cooled metal that forms a magnetic field that does not collapse. There may be greater Resistance in direction of travel to the "load" than in the field reversal, so that becomes the direction of current travel.

Answer 3

Electrons do not reverse direction, its the magnitude of the current as a whole.

Answer 4

The magnetic field will mimic the flow of the electrons. It will grow to a certain strength, weaken to none, then grow in the reverse magnetic polarity. Great, well thought out, analytical question! I never thought about this, you are quite creative and smart. Here, check out these websites too.

http://en.wikipedia.org/wiki/Electromagnetism
http://en.wikipedia.org/wiki/Alternating_current
http://en.wikipedia.org/wiki/Direct_current
http://www.pbs.org/wgbh/amex/edison/sfeature/acdc.html
http://www.physchem.co.za/Current%20Electricity/Current.htm
http://www.magnetechcorp.com/Terminology.htm
http://www.howstuffworks.com/electromagnet.htm

I hope that I helped!

Answer 5

The Magnetic field also , grows, shrinks and reverses direction,grows and shrinks. At each point, sinusoidally. That is why transformers work.

Answer 6

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