If you have two identically wound 10 turn spirals and you connected the
inner lead of one to the outer lead of the other, the two spirals would
work as one effectively 20-turn spiral. But since I'm joining the two
inner leads together, if you imagined yourself as an electron flowing
through the coil from one outer lead to the other, you would be going CW
in
one coil and when you cross into the other, you would be going CCW. If
you
look at the photo, with the two coils wound in opposite directions and
joined in the center, you would be going in the same direction throughout
the entire path. The picture is more evident than the words.
Regards, Gary Lau
MA, USA
On Tue, Feb 5, 2019 at 9:43 AM Russell L Thornton <
russell.l.thornton@xxxxxxxx> wrote:
Gary, you mention in your web link that "the two coils were wound in
opposite directions." Can you explain why that configuration does not
cancel the field?
Thanks
Russell L Thornton
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