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Solid State Talk all about solid state amplification. 

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28th May 2007, 12:00 AM  #1 
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Join Date: Dec 2006
Location: Huntington Beach, Ca

resistance
sorry for the stupid question but i have a feeling even after i get an explanation it will still baffle me. but at the same time might explain alot to why things are done and how like biasing and stuff to me.
ok i understand that if you take 2 resisters of the same rsistance and ruin them side by side, parallel, you get a resistance of half the one resister. example say 1.6k + 1.6k would equal 800ohm. i mean thats a given. what gets me is sasy you take that 1.6k with a 100ohm you would get a resistance of 100ohm. why? ok yeah the electrons like the shortest fastest rout but why? or is my meter just a piece?
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28th May 2007, 12:04 AM  #2 
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Actually you should get about 94 ohms, the product over the sum. A good DVM will resolve way better than this, but an inexpensive or analog meter might not.

28th May 2007, 12:07 AM  #3 
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sorry that is what i get 94 ohms. what do you mean product over sum?
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28th May 2007, 12:16 AM  #4 
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Join Date: Apr 2007
Location: Sydney

Solid State > resistance
You multiply the 2 resistor values, then divide by the added values of the 2 resistors. e.g. If you parallel 1Kohm and 10Kohm,
you get 10Kohm DIVIDED by 10,000+1,000(11,000) The result is 909 ohms SandyK 
28th May 2007, 02:05 AM  #5 
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Join Date: Aug 2005
Location: Ktown

Also
Rt=((R1^1+R2^1+R3^1...+Rn^1)^1)
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28th May 2007, 05:39 AM  #6 
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word. thanks guys. I got it now.
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28th May 2007, 06:01 AM  #7 
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Join Date: Sep 2005

Jees !!!!!!!! Easy with the hard math....
for 2 resistors (R1 x R2) / (R1 + R2) 
28th May 2007, 04:41 PM  #8  
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Re: resistance
Quote:
Electricity does not follow the shortest path, or the path of least resistance, but rather all available paths according to their resistance. a 1.6k resistor allows x current to flow. Two 1.6k resistors will allow 2 times the current to flow, equol to one resistor of 1/2 the resistance or 800 ohms. 1.6k in parallel with 100 ohms would have the current of the 100 ohm plus the current of the 1.6k resistor, or about equal to one resistor of 94 ohms. 1/R + 1/R +1/R... =1/Total
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