RE: question

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

Original poster: "David Thomson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dave-at-volantis-dot-org>

Peter,

Here's a question for you.  I have a 27" flat spiral secondary.  Connected
to the outer wire is the positive terminal of a 50KV potential transformer.
The negative terminal of the 50KV potential transformer is connected to
ground.  There is nothing connected to the center of the flat spiral
secondary.  Over the outside of the 27" flat spiral secondary coil I have
wound a primary of 6 turns of coax cable.  At one of the coax ends I place a
diode.  Connecting the other end of the coax and the diode to a digital
voltmeter, I get 150V of DC current when I power up the transformer.

Why is there an induced voltage in the primary if there is no current
flowing in the secondary?  And why does the coax cable vibrate?

Dave

David Thomson
dave-at-volantis-dot-org <mailto:dave-at-volantis-dot-org>


-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Monday, January 28, 2002 5:36 PM
To: tesla-at-pupman-dot-com
Subject: question


Original poster: "Peter Lawrence by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<Peter.Lawrence-at-Sun-dot-com>


Trick question for the day...

Tesla coils work by "induction", the changing magnetic field around the
secondary coil induces a voltage in it. The direction of the induced voltage
is that of the coil, so the question is why don't the sparks also go around
in the same circular pattern as the induced voltage.

Trickier question, why doesn't this happen when the toroid breaks out early.

Peter Lawrence.