Date: Tue, 12 Feb 2002 09:38:48 -0500

Author: Jerry Hester

Subject: Re: VDG/Tesla coil


Richard Berg wrote:

> Snip.... We do an experiment

> where we light a fluorescent tube by holding one end near the secondary of
> the final coil, and that current must go somewhere (into the holder?).

This doesn't sound quite right. The current doesn't have to go anywhere, in fact
you don't have to hold the bulb. You can lay it on an insulator. With a rapidly
changing ac field, the electrons are busily running back and forth from one end of
the bulb to the other without ever making any progress. They do however suffer
many collisions in the process. If you create an arc (spark), then you definitely
have current going somewhere.
Jerry Hester
Laboratory/Lecture Demonstrations Coordinator
Department of Physics
Michigan Technological University
1400 Townsend Drive
Houghton, MI 49931-1295
Phone: (906) 487-2273
Fax: (906) 487-2933