Re: Cancel magnetic field in one current carring wire

"Thinking123" <jpb193@xxxxxxxxx> wrote in message
news:1114718917.124295.297310@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Can anyone suggest the best way to shape a single wire carring a
> current so that it's magnetic field cancels itself out? Completely if
> possible. I'm trying to optimize the idea for light weight and varying
> current values.

The cancellation will be nearly complete if half of the
wire runs back along the same path as the other half.
Twist the halves together and it will be better yet. Put
a hole down the middle of one half, enlarge it, and run
the other half back thru the hole, (coaxially), and the
cancellation is as perfect as the coaxiality.

If the single wire has to carry current from one point
to another in a different place, then you are chasing
a rainbow. There will be a magnetic field created
by that current, no matter what path it takes between
the two separated points.

> All I can think of would be to bunch the wire into a
> tight zig-zag plane. (From:---------- To:||||||||) Would that work? Or
> would it produce the same field...and just be heavy?

It would produce very nearly the same field, and just
dissipate more heat to carry the same current.

> Any help would be great, thanks.

You could get better help by stating more of your
real problem and constraints.

--
--Larry Brasfield
email: donotspam_larry_brasfield@xxxxxxxxxxx
Above views may belong only to me.


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