X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com Message-ID: <20120316142719.26210.qmail@stuge.se> Date: Fri, 16 Mar 2012 15:27:19 +0100 From: Peter Stuge To: geda-user AT delorie DOT com Subject: Re: [geda-user] Daughter's Science Fair Mail-Followup-To: geda-user AT delorie DOT com References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Reply-To: geda-user AT delorie DOT com Errors-To: nobody AT delorie DOT com X-Mailing-List: geda-user AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk Rob Butts wrote: > shouldn't the electromagnetic field produced by the coil and nail > with the battery induce a current in the other coil when placing > the nails adjacent and parallel? There are no DC transformers, right? http://van.physics.illinois.edu/qa/listing.php?id=2354 //Peter