(adsbygoogle = window.adsbygoogle || []).push({}); [SOLVED] Using Kirchoff's Rules

1. The problem statement, all variables and given/known data

http://img266.imageshack.us/img266/4120/kirchoffho1.gif [Broken]

In the circuit, I_1 = 1.6 A. Find the value of: (a) the current I_2 and (b) the current I_4.

2. Relevant equations

Junction Rule, Loop Rule, V=IR

3. The attempt at a solution

Small loop, top left:

2V + (2ohms)(I_2) - (4ohms)(1.6 A) = 0

(2 ohms)(I_2) - (6.4) = -2

2 ohms * I_2 = 4.4

I_2 = 2.2 A

That also means that the current in the entire circuit is 4.4 Amps.

...Right?

That is as far as I got. Assuming my answer for I_2 is correct, all I have to do is find I_4, which I am stumped on how to do. Should I combine the two resistors on the top left, since they're in series?

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Using Kirchoff's Rules

**Physics Forums | Science Articles, Homework Help, Discussion**