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Old 11-21-2006, 12:08 PM   #111
xtphreak
from B4 "adventure bikes"
 
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Joined: Jul 2004
Location: Back in WNC
Oddometer: 7,960
Quote:
Originally Posted by adaycj
I'll likely get slammed by some EE that shows me some fundamental thing that I am missing here, but I have noted some things in my electrical life that may be of interest here.

OHMS law is great and all but it seems to have one "flaw" that I have uncovered in automotive applications. Now first let me say that I do not dispute the laws of physics, or electricity. My observation is simply this. 12v = 1ohm * 12 amps. Use an ohm meter on the bench and I see 1 ohm. Hook up the circuit and I measure 10 amps with an inline amp meter. I go back thinking I have a power supply voltage problem. Nope, total voltage drop is 12v. What happened?

The bulb got hot. Resistance changed when the bulb was 600 degrees f or what ever temp it turned out to be. Any chance the unexpected results some have gotten are related to this behavior?
try a resistor vs. a bulb filament
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