# Circuits! help

#### qwerty2x

1. Homework Statement

http://img25.imageshack.us/img25/5953/elek.png [Broken]

2. Homework Equations

v=IR

3. The Attempt at a Solution
I have tried finding the total resistance of the circuit and then applying ohms law. My answer is 0.65 Amps but thats incorrect.

Any help is much appreciated!

Last edited by a moderator:
Related Advanced Physics Homework Help News on Phys.org

#### tiny-tim

Homework Helper
I have tried finding the total resistance of the circuit and then applying ohms law. My answer is 0.65 Amps but thats incorrect.
Hi qwerty2x!

Show us your full calculations, and then we can see what went wrong, and we'll know how to help!

#### srabate

Use the equivalent resistance formulas and then Ohm's Law

For two resistors in series $$R_{eq} = R_{1} + R_{2}$$
For two resistors in parallel $$\frac{1}{R_{eq}} = \frac{1}{R_{1}} + \frac{1}{R_{2}}$$

or two resistors in parallel simplified $$R_{eq} = \frac{R_{1}R_{2}}{R_{1}+R_{2}}}$$

Hope this helps!

### Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving