Ratio of resistance in parallel and series

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SUMMARY

The discussion focuses on calculating the ratio of two resistors, R1 and R2, connected to a voltage source V, where R1 is greater than R2. When connected in series, the current is Is, and when connected in parallel, the current is Ip = 8.0Is. The goal is to determine the ratio R2/R1 based on these conditions. Participants are encouraged to clarify the formulas used for calculating the currents in both configurations to derive the desired ratio.

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  • Understanding of Ohm's Law
  • Knowledge of series and parallel resistor configurations
  • Familiarity with current calculations in electrical circuits
  • Basic algebra for manipulating equations
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Students studying electrical engineering, hobbyists working on circuit design, and anyone interested in understanding resistor behavior in series and parallel configurations.

mitsuruangel
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Homework Statement


Two resistors R1 and R2, where R1 > R2, are connected to a voltage source with voltage V. When the resistors are connected in series, the current is Is. When the resistors are connected in parallel, the current from the source is Ip = 8.0Is. What is the ratio R2/R1?
I have played with this and I don't understand how to get it. Any help would be awsome
 
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Welcome to PF!

Hi mitsuruangel! Welcome to PF!

(try using the X2 tag just above the Reply box :wink:)

What formulas are you using for Ip and Is, as a function of V R1 and R2 ? :smile:
 


tiny-tim said:
(try using the X2 tag just above the Reply box :wink:)


I'm not seeing any tags in my view, tiny. Do you see some?
 
Hi berkeman! :wink:

Yes, just above where I'm now typing, on the Reply to Thread page. :smile:
 
Hmm. I see this instead. Wonder what I need to do to see the tags...

Tags
None

How many do you see?
 
ah, you're still on the main page, I'm on the Reply to Thread page (click "QUOTE" or "Go Advanced") :wink:
 
Ohhh! I understand now. Thanks.

[/hijack]
 

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