View Single Post
Old 04-30-2002, 12:14 AM
Mike Murrell's Avatar
Mike Murrell Mike Murrell is offline
Registered User
Join Date: Feb 2000
Posts: 2,141
Automotive Electricity 101 Question

Voltage - electrical pressure
Current - flow
Resistance - created by a consumer, break in path; resistor.

Resistance is fairly straightforward. It would seem that there's a relationship between voltage and current. One volt pushes one amp thru one ohm.

Familiar with the "water pipe" scenario used to explain the difference between voltage and amperage(current).

In automotive diagnosis, one sees that tests are required for any one of the aforementioned, depending on the device/situation. Again, an ohm(resistance) test would be carried out to find a break in a circuit. Easy enough.

I'm trying to get a better grasp on voltage vs. current. Some auto tests say to test for a given voltage. Others say test for a given amt. of current. Is there a fundamental concept/rule that decides which of the two one tests for?

Thanks for your time.
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC

James Madison - Oppressors can tyrannize only when they achieve a standing army, an enslaved press, and a disarmed populace.

Liberty Firearms Training - After years of trying to regulate California criminals with a never ending stream of gun control laws they have still not given up with the belief that if they make something a crime that criminals will miraculously start obeying the law.
Reply With Quote