- #1

Saladsamurai

- 3,019

- 6

**!Resistance/Circuit Help Badly Needed!**

## Homework Statement

I am doing a circuit lab with the voltage and resistors shown. I have already

*measured*the currents across each resistor, but now I need to use some of the theory that we have learned in class. Here is an image of the original circuit.

As you can see I have reduced it to a single equivalent circuit.

Now I am working backwards to try and find the currents shown. Now keep in mind that the index for the current

*i*may not be the same index as its respective resistor... that is, [itex]i_1[/itex] does not necessarily coincide with [itex]R_1[/itex]. I realize that that is annoying, but I did not type up the lab!

Now can someone help me to just find [itex]i_4[/itex] for now. I know that the current across [itex]R_{eq}[/itex] is 307.3 mA.

I also know that (working backwards) that [itex]R_{eq}[/itex] was made up from [itex]R_{6}+R_{12345}[/itex] which were in series with each other.

So shouldn't the current across [itex]R_{12345}[/itex] be the same as the i_total ? Thus making i_4=i_total=307.3 mA

Now I am pretty sure that I am not correct in saying this (because my measure currents dictate so) but I am not sure why?

Also, it says to find the currents sing the "Ladder Method"...I am assuming the above is just that.

I also have to find the currents using the "Scale Factor Method"... can someone clue me into how to do that one? I know it has to do with making an assumption and then calculating the currents based on it and this in turn leads to a scale factor.

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