Looking for an EE textbook recommendation (university level)

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sandmanwake

Golden Member
Feb 29, 2000
1,494
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T/Pi configuration for resistors or delta configuration?

Edit: Dang it, my drawings didn't come out too well--just google what I'm talking about.
 

fire400

Diamond Member
Nov 21, 2005
5,204
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delta: http://www.play-hookey.com/dc_theory/delta_wye.html

"Resistors do not occur in isolation. They are almost always part of a larger circuit, and frequently that larger circuit contains many resistors."

"You might wonder just how often you actually find resistors in series. The answer is that you find resistors in series all the time."

"The other common connection is two elements in parallel. Two resistors or any two devices are said to be in parallel when the same voltage physically appears across the two resistors."

http://www.facstaff.bucknell.e...ml/Resist/Resist2.html

high school physics redone.

this thread is done.
 

Evadman

Administrator Emeritus<br>Elite Member
Feb 18, 2001
30,990
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Originally posted by: fire400
Resistors do not occur in isolation.[/b]

That is a lie. Here's one, thouugh it is pretty complicated. An auto batetry load tester is just a 500 amp 12volt resister with 2 leads.
 

Leros

Lifer
Jul 11, 2004
21,867
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Originally posted by: Evadman
Originally posted by: fire400
Resistors do not occur in isolation.[/b]

That is a lie. Here's one, thouugh it is pretty complicated. An auto batetry load tester is just a 500 amp 12volt resister with 2 leads.

Nope, you're gonna hook that into a circuit. Thus not isolation.
 

Gibson486

Lifer
Aug 9, 2000
18,378
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Ummm....what is all the arguing about?

The only time a resistor cannot be in series or parallel is if you isolate it. That means it is hooked to nothing. What is so hard to understand about this? If if the circuit had only one reisistor, you still have impredance you have to take into account with rescpect to the other parts of the circuit. If the resistor is shorting the supply to itself, then it is in series with the supply.

The whole point of delta and wye is that you cannot simplify the circuit into one resistor since they either share a common potential (or node) or the common ground is not common at all. yes, you could say they are not in series or parallel, but to do the conversion, you need to make assumptions on whether they are in series or parallel.
 

Triumph

Lifer
Oct 9, 1999
15,031
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Originally posted by: futuristicmonkey
Originally posted by: CallMeJoe
Originally posted by: Triumph
Originally posted by: DrPizza
What if you made a circuit such that there was zero potential difference across the resistor? i.e. two series circuit loops, and connect two points with equal potential between the circuits?
If there is no potential difference across a resistor, it means that the resistor is not connected at one end.
If there is no potential difference across a resistor, it means that the resistor is not connected to a voltage/current source.

Then how do you explain a Wheatstone bridge? Consider a quadrilateral whose sides are composed of equal resistors. Suppose a resistor is placed across one of the diagonals and a voltage/current connects the remaining two vertices. You now have a resistor with a zero potential difference across it, which is (sort of) connected to a voltage or current source.

The above two statements are false.

A wheatstone bridge has an open circuit across the diagonal. You just closed it and changed the dynamics by placing a resistor across the diagonal. I can imagine a bunch of scenarios where the current would flow through that resistor.
 

desy

Diamond Member
Jan 13, 2000
5,447
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thats why I said all by its lonesome way back ;)
ITs always in series or parallel with something or sitting in the parts bin
 

Born2bwire

Diamond Member
Oct 28, 2005
9,840
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Originally posted by: RESmonkey
its not a physics class. It's Intro to Electrical and Computer Engineering (circuits class). But theres no fucking textbook!

Don't they have course notes for you? That should be more or less sufficient. If you need anything more basic then I would think you could find it via internet.