11-1-2008, 08:54 PM | #1 |
SIU Making a COMEBACK
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[High School -Physics] Resistor Networks
First of all, sorry if this is in the wrong forum. I didn't see any other place to put it.
So I got this homework to do, and I've pretty much figured it all out using a bus diagram, except for one part. I don't know how to approach Resistors 7 through 9 and 10 through 12. The only idea that I have is that they equalize between 7 and 8, and 10 and 11. If anyone actually knows how to approach this, I would very grateful for any help. Thanks. This is the only idea I have as far as a bus diagram: One last thing: Just a check on how to find the currents at E and D: Do I just add up all the currents traveling along each separate loop? Last edited by sayuncle990; 11-1-2008 at 08:58 PM.. |
11-1-2008, 09:06 PM | #2 |
missa in h-moll
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Re: Need Help With Physics Homework - Resistor Network
Critical Thinking>Homework Help
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11-1-2008, 09:10 PM | #3 |
SIU Making a COMEBACK
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Re: Need Help With Physics Homework - Resistor Network
Sorry then, I saw
Critical Thinking (3 Viewing) An area specifically for higher-level thinkers. Debates, Essays, Politics etc. And thought that homework wasn't the right area. Is there anyway I can move it? Or does a mod have to do that? |
11-1-2008, 09:16 PM | #4 |
(+ (- (/ (* 1 2) 3) 4) 5)
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Re: Need Help With Physics Homework - Resistor Network
A mod will have to do that. PM devonin or squeek (they're online right now); they should be able to do it.
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11-1-2008, 09:18 PM | #5 |
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Re: Need Help With Physics Homework - Resistor Network
Don't bother.
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11-1-2008, 11:28 PM | #6 |
Snek
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Re: Need Help With Physics Homework - Resistor Network
I doubt many people are willing to do more homework then they are already given.
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11-2-2008, 01:27 AM | #7 |
Very Grave Indeed
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Re: Need Help With Physics Homework - Resistor Network
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11-2-2008, 01:43 AM | #8 |
FFR Player
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Re: [High School -Physics] Resistor Networks
I'm glad we have never had to work with that big of a circuit.
If I'm understanding your question correctly: 7-9 and 10-12 are series, and are both series are in parallel. So you know that: R(7 to 9) = R7 + R8 + R9 R(10-12) = R10 + R11 + R12 Then set them up in parallel: [1/R(7to9) + 1/R(10to12)]^-1 |
11-2-2008, 08:11 AM | #9 |
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Re: [High School -Physics] Resistor Networks
I thought about that, but it starts and ends at 24 Volts. So how would the current react? Because if V=IR, then the current throughout that would be zero, because the drop is zero. But are you saying that that does not matter, and I can treat it as a normal parallel series?
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11-2-2008, 11:07 AM | #10 |
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Re: [High School -Physics] Resistor Networks
The current through it couldn't be zero because the Junction Rule states that the total current into it is equal to the total current out of it.
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11-2-2008, 12:16 PM | #11 |
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Re: [High School -Physics] Resistor Networks
But if I treat it as a series, and come out with a 24 Ohm resistor on the top, I know the drop in voltage across that is zero volts. Using Ohm's law, it would come out as I = V(zero)/24 Ohms. This makes the current zero, and thus every drop zero volts. I don't know how else to look at it. We didn't cover any Junction Rule...But then again if the current going in is zero, then the current go out is still zero.
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