delorie.com/archives/browse.cgi   search  
Mail Archives: geda-user/2012/03/16/10:57:15

X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f
X-Recipient: geda-user AT delorie DOT com
Message-ID: <4F6354C2.10502@keensupport.net>
Date: Fri, 16 Mar 2012 07:57:06 -0700
From: Joe Knapp <joeknapp AT keensupport DOT net>
Organization: Keen Support Services, LLC
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2
MIME-Version: 1.0
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] Daughter's Science Fair
References: <CALSZ9gp3RUu2WiEU9SoJROD+3LQcF3XR4YKJiKP1P-U2OWM4-Q AT mail DOT gmail DOT com> <20120316142719 DOT 26210 DOT qmail AT stuge DOT se> <4F63506D DOT 90602 AT keensupport DOT net>
In-Reply-To: <4F63506D.90602@keensupport.net>
Reply-To: geda-user AT delorie DOT com

Rob,

What may work for you though, is that if you place the two coils,
perhaps in series, perhaps adjacent, one with the light bulb connected
and the other with the battery, you may see the light bulb illuminate
briefly when you disconnect the battery.  This is due to the rapidly
diminishing magnetic field produced by the coil connected to the C battery.

I think that is enough random comments from me.

Good Luck,

Joe


On 03/16/2012 07:38 AM, Joe Knapp wrote:
> Sorry, missed the whole point about DC. Absolutely true.
>
> On 03/16/2012 07:27 AM, Peter Stuge wrote:
>> 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
>>

-- 
Keen Support Services, LLC
http://keensupport.net

- Raw text -


  webmaster     delorie software   privacy  
  Copyright 2019   by DJ Delorie     Updated Jul 2019