# Ohm's law, voltage, amperage.... short circuited

Discussion in 'The Lounge' started by sled_dog, Apr 11, 2005.

1. ### sled_dog1 ton status

Joined:
Sep 3, 2002
Posts:
16,870
0
Location:
Austin, TX
Short circuited my brain with my homework. Gave me a bunch of series and parellel circuits and I had to find things like total resistance and amperage and voltage at certain points. Ugh... I can't wait to be doing this stuff hands on(sarcasm alert).

2. ### chevyfumesCourt jester

Joined:
Feb 24, 2000
Posts:
38,584
266
Location:
Watch for the muzzleflash!
I am by far the stoooopidest person on the friggin planet when it comes to electricity, I've had it explained in detail several thousand times and the only thing I understand is that it's mosty invisible and hurts like a summbitch when you get bit...

3. ### thezentree3/4 ton status

Joined:
Sep 19, 2003
Posts:
7,198
0
Location:
NC
I hate that crap. So much. Can't wait to do it again when I take intro to engineering again next semester (don't ask).

4. ### tx_sub1/2 ton status

Joined:
Mar 5, 2004
Posts:
548
0
Location:
Denton, TEXAS
water flows like air flows like electricity. if you can figure circuits out, you can use it on fluid systems too. i hated circuits stuff like that. i'll take thermal analysis over electricity anyday.

5. ### RussellLB7 Tahoe StatusPremium MemberGMOTM Winner

Joined:
Jun 23, 2000
Posts:
7,923
333
Location:
Fort McMurray, Alberta
It wasn't that bad! Only a couple little formulas to remember That was my best unit in Physics less Momentum!

6. ### spearchucker1/2 ton status

Joined:
Nov 17, 2003
Posts:
1,556
0
Location:
Bay area, CA
Just break the larger circuit into smaller and simpler parallel/series circuits. Then piece them together little by little into the larger circuit. It's a pain but the only way to do it. Once you find the total equivalent resistance you can then figure out the voltage and amperage in each piece. Very time consuming but fun stuff.

Last edited: Apr 11, 2005
7. ### ntsqd1/2 ton status

Joined:
Nov 28, 2002
Posts:
3,381
0
Location:
So. CA
Could take this approach and chunk it into Excel if you're reasonably good at programing Excel. Make IT do all those calcs.

8. ### az-k51/2 ton status

Joined:
Oct 15, 2003
Posts:
2,774
0
Location:
Phoenix AZ
I despise electrical. Friggin electrical networks (electrical engineering 201) kicked my azz so bad I still don't like seeing a DC sign.

9. ### surpip1 ton status

Joined:
Apr 7, 2004
Posts:
10,877
0
Location:
sacramento ca
I liked it alot, took it in HS but just like anyhting else i diddent use it much, but In "A" school in the navy, i had to do it all again, picked it back up real fast, and placed second in my class, with no studding at all
Luckley for me there was no english in "A" school

10. ### K5MONSTERCHEV1/2 ton status

Joined:
Jan 27, 2003
Posts:
3,254
0
Location:
Castro Valley, CA
Get used to it if you want to work on cars nowdays! THATS ALL IT IS!!

11. ### Bubba Ray Boudreaux1 ton status

Joined:
Jan 21, 2001
Posts:
20,716
2
Location:
Undisclosed Location
I hear ya. When I went through Automotive Electricity, I about went nuts with that Ohm's Law stuff.......................

12. ### unclematty1/2 ton status

Joined:
Jan 24, 2003
Posts:
3,164
0
Location:
SLC UT
I just went through this too in my aviation class, if you need help just ask! I got it!

13. ### newyorkin1 ton status

Joined:
May 8, 2001
Posts:
16,555
157
Location:
I"m jealous man, I've wanted to learn this stuff for a while, but can't seem to hold focus long enough in self-study.
I think if I had a class or a teacher on it, I'd be set now. I tried to build a circuit to toggle the rear window up and down on the K5 from the "trunk" button on the remote starter, but I was too feeble in knowledge and never got it done...

14. ### R72K5Banned

Joined:
Mar 5, 2001
Posts:
8,905
0
Location:
central IL
i have same problem.. am VERY interested but i cant focus and stay with it and therefore cant pick up on very much of it at all

and this goes for everything in my life, except for older vehicles,

anything els ei dont care much about, cept space and technology news

oh and women.. and food, and sleep,, and air to breathe,,

thats it though, nothing else.,

i dunno what this life is for really,, ive already gone insane, so oh well.,,

good luck in the course/class, youre farther ahead than i can get, big time.,.

15. ### mr_clean1/2 ton status

Joined:
Sep 21, 2003
Posts:
348
0
Location:
Sacramento, CA
I've had those classes so many times (2 different colleges and Avionics/Electronics school in the AF) and some of that stuff never did make too much sense to me. Wait until you see some of the bigger formulas like Capactive Reactance and Inductive Reactance...

Fortunately for me in the AF I worked all flightline so there was no component level troubleshooting!!!

16. ### sled_dog1 ton status

Joined:
Sep 3, 2002
Posts:
16,870
0
Location:
Austin, TX
I got all the stuff fine. When I went to class today it all just snapped into place. The few I had no answers for became obvious. I used to know this stuff well but I forgot. I used it with my computer hobby often. I wired up a rear window on my K5, it was a factory crank setup. Wasn't very difficult. One thing I have no idea about is wire sizing. I just used whatever I have, sometimes its too small or somethings too big I'd say but I really don't know. Should learn that soon(actually started talking about it right before we left for lunch).

Joined:
Mar 6, 2000
Posts:
4,389
0
Location:
PA
If you're interested, I can scan a nice wire size chart out of my A&P General textbook...

18. ### sled_dog1 ton status

Joined:
Sep 3, 2002
Posts:
16,870
0
Location:
Austin, TX
If you could I certainly would be.

It doesn't help through all of this that my teacher is a total dick. He gets angry at the stupidest things and blames you all the time, even if hes wrong. Yesterday was the first really relaxed day we had, cause he wasn't there.

19. ### K5MONSTERCHEV1/2 ton status

Joined:
Jan 27, 2003
Posts:
3,254
0
Location:
Castro Valley, CA

That sucks man. Sound like some of mine. The teacher can make the biggest difference on your learning experience. Good teachers seem hard to come by these days.

Joined:
Jul 15, 2001
Posts:
2,462