# Need help with beginner DC Circuits questions

Discussion in 'Homework Help' started by Voz, Sep 4, 2014.

1. ### Voz Thread Starter New Member

Sep 4, 2014
2
0
Hello, I have some homework due, and I'm hitting a wall on this problem. Our professor has provided us with the answers, but we must show our work. I've posted a picture of the problem I'm working on right now that's giving me a hard time. Thanks for the help!

http://imgur.com/NXr3yhB

Edit: I forgot, where you see [3], there is a 2A going into the negative side of [3]

2. ### mjakov New Member

Feb 13, 2014
20
5
Hi,

we can use Kirchoff's Current Law for the circuit node between the elements 1 and 2. The sum of ingoing and outgoing currents has to be zero, thus:
$I_x + 2A - 2I_x = 0$
$I_x = 2A$

3. ### Voz Thread Starter New Member

Sep 4, 2014
2
0
Thank you. I was doing multiplication the whole time, and it was coming out to be like
$I_x * 2A = 2I_x$
Which is a big "duh".
I feel dumb now.