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I have the circuit below (also attached as an image):

Note:

^^^^ & <<<< = resistors

[-]=power supply

...=just space

(-) & (+) indicates + & - side of battery

A,B represent the junctions

|-----^^^^------A-----^^^^------|

|........................|........................|

<.......................<.......................(-)

<.......................<......................[-]

<.......................<.......................(+)

<.......................<.......................|

|........................|........................|

|----(+)[-](-)----B-----^^^^------|

R1=100 ohm (center far left)

R2=560 ohm (top left)

R3=330 ohm (center)

R4=300 ohm (top right)

R5=100 ohm (bottom right)

Va=1.5 V (bottom left)

Vb=1.6 V (center far right)

(This is also attached as an image. Sorry for the lack of quality, working quickly in paint.)

Okay, now that we've got the setup, I need help in determining my equations, well for the junction rule at least. My voltage equations are as follows:

Va-I1R1-I2R2-I3R3 = 0 (left loop)

Vb-I4R4-I3R3-I5R5 = 0 (right loop)

Va-I1R1-I2R2-I4R4+Vb-I5R5 = 0 (entire loop)

Okay, for the junction rules. I need two of them to have five equ for my five unknowns...which are the I.

Would they be,

I1+I2+I4=I3 (junction A)

I3=I5 (junction B)

Current in = Current out

Are these equations correct? I'm trying to find the current for each resistor and then go back and find the voltage. The latter is no problem, it's just determining that my equations are correct for current I.

Thank you for your assistance and have a nice day!

Christina

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# Homework Help: Kirchhoff Circuit: Current, Resistors, Voltage

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