Re: First EM lab

[Brian McInnes <bmcinnes@PNC.COM.AU>]

on 14/1/02 8:20 AM, Joseph Bellina at jbellina@SAINTMARYS.EDU wrote:

> If you estimate the radius of the pencil point, and you know the maximum
> E field before an arc can occur in air, then you can easily estimate the
> charge on the pencil point.  Alternately, having previously shown that
> about 1 in 100,000 surface sites on the tape is charged, you could make
> a reasonable estimate of the charge on the pencil point.
And, if readers are intrigued by the esoteric-looking clues being dropped
all over the place, take yourselves to the library or to Amazon ($78.10 well
spent) and look at Matter and Interaction: Electric and Magnetic
Interactions by Chabay and Sherwood

Brian mcInnes