I need help finding the relationship of the resistors in the circuit. I am not sure which are parallel and which are part of a series...See the attached image. Thanks

Question

anonymous · Answer

sorry hold on.  having trouble with the image. one sec!

anonymous · Answer

attachment

anonymous · Answer

If R4 wasn't there I would say that those two lines are two series in parallel...

anonymous · Answer

Since its given that current in R4 is 0 you can remove R4.

anonymous · Answer

Then later on when I need to determine Rx I will use?

anonymous · Answer

It becomes a balanced wheatstone bridge.
R2/R1=RX/R3.

anonymous · Answer

wheatstone bridge?  I suppose I should do a search on that.

anonymous · Answer

But those two series groups are indeed parallel, correct?

anonymous · Answer

yeah thats correct.
The condition for i4=0 is the condition i have stated above

anonymous · Answer

imaginary "i"?  Haven't incorporated that into my circuit knowledge yet but okay. Thanks for your help!

anonymous · Answer

imaginary??

anonymous · Answer

i4

anonymous · Answer

Oh you mean R4

anonymous · Answer

i4=0. It ain't imaginary current though R4 is zero. How on eartch do you say its imaginary?

anonymous · Answer

Oh you mean capital I... as in current

anonymous · Answer

yeah... lol

anonymous · Answer

ch'yeah