# Homework Help: Find total resistance in a network

1. Sep 20, 2014

### Zondrina

I can't get this last problem in the chapter. I am asked to find $I_x$ in the following network:

My first hunch was to apply KCL to the node above the $2I_x$ source:

$10 + 2I_x - \frac{V}{2} - 3 + I_x + \frac{V}{5} + \frac{V}{10} = 0$

Where I have assumed the voltage $V$ is across all components in parallel. From here I've tried various things, but to no avail.

2. Sep 20, 2014

### phinds

can you compress the 10ma and 3ma sources down to one source and reduce all the resistors down to one resistor to get an expression for V that is only in terms of Ix and the total resistance?

That's probably too many hints already. You should be able to take it from there.

3. Sep 20, 2014

### Zondrina

Thank you sir, every problem in chapter 2 is now complete (there was a lot in this chapter, > 100). I obtained $I_x = - 1.5 mA$.

I can finally take it easy after all that, feels like an abyss in my brain right now. I owe you one.

4. Sep 20, 2014