Ratio of resistance in parallel and series

[mitsuruangel]

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

 

[tiny-tim]

Welcome to PF!

Hi mitsuruangel! Welcome to PF!

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

What formulas are you using for I_p and I_s, as a function of V R₁ and R₂ ?

 

[berkeman]

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

I'm not seeing any tags in my view, tiny. Do you see some?

 

[tiny-tim]

Hi berkeman!

Yes, just above where I'm now typing, on the Reply to Thread page.

 

[berkeman]

Hmm. I see this instead. Wonder what I need to do to see the tags...

Tags
None

How many do you see?

 

[tiny-tim]

ah, you're still on the main page, I'm on the Reply to Thread page (click "QUOTE" or "Go Advanced")

 

[berkeman]

Ohhh! I understand now. Thanks.

[/hijack]