Re: Decrement (?) (Re: (Fwd) RE: Longitudinal Waves)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Cory Roussel by way of Terry Fritz <twftesla-at-qwest-dot-net>" <imcuddlycory-at-yahoo-dot-com>

Hello Coilers,

Here is a VERY basic question that has BOTHERED ME for
a long time but i never really got to thinking about
it too much... In a transformer, why is it that the
poles are reversed on every cycle (IE AC)!?  Why is it
necisary that the voltage be changed, and not
constant...  I dunno these are very simple and i just
cant figure out even though they are SO simple...


Sincerely,

 Cory Roussel
--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "davep by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <davep-at-quik-dot-com>
> 
> 
> > While we are on the topic, what is the current
> scientific explanation
> > for the variation of voltage in a damped sine
> wave?
> 
> 	What is meant by 'the variation in voltage'?
> 	If this refers to the decrement in amplitude of the
> 
> 	successive peaks, same as it has been for 150
> years:
> 		losses of energy from the circuit, by
> 		'pure' loss (resistance) and EM radiation taking
> 		energy off and by losses in near by objects,
> 		eg by inductive or capacitive coupling, leading
> 		to losses in those objects.
> 
> 	If:
> > What force is believed to determine when the wave
> will reverse
> > direction?
> 
> 	Depends rather on the source of the wave.  If an
> alternator,
> 	then its the motion of the field/rotor.  If an
> 'inverter',
> 	or similar, then the switches internals, if a shock
> excited
> 	resonant circuit, the resonance.  In any case, each
> is basic
> 	science, not much changed in 100 years or so.
> 
>  	best
> 	dwp
> 
> 
>