11 May
2010
11 May
'10
2:02 p.m.
----- Original Message -----
From: "Chuck Guzis" <cclist at sydex.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Tuesday, May 11, 2010 3:29 PM
Subject: Re: School (Was: Lisa C and Lisa FORTRAN
On 11 May 2010 at 13:37, John Foust wrote:
Any metal filaments have slightly different resistance when cold and when
glowing hot, they are designed with the properties of metal when at
operating temperature.
Don't you get a voltage drop with each bulb in series? First bulb has enough
voltage to light and the next one does not?
At 01:05 PM 5/11/2010, Chuck Guzis wrote:
Yes, four seemingly identical bulbs from
identical flashlights
from Walmart. I tried any two in series. Only one lights.
It might be interesting to see what Mr. Ohmmeter says about the cold
resistance of each lamp.
--Chuck