Recent content by IronHide

Yes I2, came out negative for me, which is weird because of the direction it is in relative to I2, but I guess at the junction, it's negative because of which way loop 1 flows. Thanks for the help, calculated all voltage drops across loop 1, which came to 0, so works well.

4-i1*6000-i3*8000 (1) 2-i2*4000-i3*8000 (2) As I3=I1+I2 Then sub to get rid of I_2, and then again to sub into each other to get rid of I2 to get: 2+4000*I1=6-9000I*1 Therefore I1 = 0.000308 A (Taking I1 = 4v branch, I2 = 2v branch, I3 = 8 k ohm bit.) Then I...

So just make the equation of I1+I2+I3=0, sounds good good to me.

Loop 1 (4v one): 4-I1*6000-I3*8000=0 Loop 2 (2v one): 2-I2*4000-I3*8000=0 Look about right? Then just use cramers rule to solve?

Thankyou for all quick responses. I don't have answers, (not looking for them), but just wanting to check mine against them when I do it all. And I've been taught to use cramer's rule to solve, but that just seems like a massive waste of time sometimes.

http://i40.tinypic.com/34ytcvq.jpg Heres the question, so basically you treat it as a normal question? not even a junction really, and just work through it. One of the questions is the current through the 5k ohm resistor, and another is the potential diff across the 8k ohm resistor. So just...

Also I have another question like this, so can I send my working out to you Tiny-Tim, and make sure you think its all okay?

So Loop One: 12+15-I3*50-I1*20? Well I get the right answer for that part of the question. Just like to say, a thanks to all who helped. I'm so grateful for the swift replies, and no one made me feel that dumb, and now I feel like how did I not realize this earlier. Thanks also for not...

I did, I am just not confident. Obviously the +12V but then I am confused as you go down the middle section, -15V, and the 50 ohm and 20 ohm resistors, use what current? And then I've got other stuff to worry about (Subject wise). Just the kind of the guy who will find out the method and see...

Feel so stupid that I can't even write the equations, either I am really having a huge blank, or I am really dumb. To be honest, need a step by step on how to write them even remotely properly.

Thanks will give it a try now, I can see myself ending up around a lot.. so many questions.. seems physics problems are infinite. ;)

So when I do loop 1 per say; I have to take into account the 15V battery as well and -/+ it into my equation as well? Cheers for the response too

Homework Statement Relavent information is provided in the picture. Trying to solve the currents, I1, I2, I3.Homework Equations I(1)+I(2)+I(3)=0The Attempt at a Solution Too messy to even show. Basically I'm having a massive trouble understanding kirchhoffs laws and this problem in particular...