Thread: Sidebands
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Old December 30th 10, 04:20 PM posted to rec.radio.amateur.antenna
K1TTT K1TTT is offline
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Default Sidebands

On Dec 30, 3:59*pm, "Szczepan Bialek" wrote:
Uzytkownik "K1TTT" napisal w ...
On Dec 30, 8:56 am, "Szczepan Bialek" wrote:



So " During those years there were many changes in the understanding of

electricity and magnetism" and the hand rule becomes a physical law.
S*
so you have taken 2 unrelated drawings without the explanatory text to


show what?

Maxwell model (page 304):http://en.wikisource.org/wiki/On_Phy...Lines_of_Force
"Let the vertical circles V and V represent the molecular vortices of which
the line of magnetic force is the axis. V revolves as the hands of a watch,
and V the opposite way."

"We have thus obtained a point of view from which we may regard the relation
of an electric current to its lines of force as analogous to the relation of
a toothed wheel or rack to wheels which it drives."

The 'hand rule' as you call it is not a physical law, it is a


convention that is used to easily remember relationships expressed in
higher mathematics. *There is no magic or physical meaning to it... in
fact both 'hand rules' are used depending on how you learned your
electronics, as long as you are consistent the provide identical
results.

But what kind of force cause the magnetic flux?

In Part IV Maxwell wrote:
"Now it seems natural to suppose that all the direct effects of any cause
which is itself of a longitudinal character, must be them- selves
longitudinal, and that the direct effects of a rotatory cause must be
themselves rotatory. A motion of translation along an axis cannot produce a
rotation about' that axis unless it meets with some special mechanism, like
that of a screw, which con- nects a motion in a given direction along the
axis with a rotation in a given direction round it ; and a motion of
rotation, though it may produce tension along the axis, cannot of itself
produce a current in one direction along the axis rather than the other."

Does Heaviside's mechanism in form of *the 'hand rule' "works fine for you."
EM is for kids. Are You?
S*


EM is for kids?? i take it that you think EM is too simple and you
must have a more complicated theory? if that is so then i understand
why you are trying to study ancient research, back then there were
many competing theories each with separate complicated descriptions
about rotations and forces... all of those were made simple when
Maxwell combined the essential 4 equations to describe electromagnetic
interactions, add in ohms law and the Lorentz force equation and you
have everything necessary to describe EM effects... Sometimes simple
is best.