# Homework Help: Direction of the magnetic field

1. Jul 21, 2017

### Cici2017

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

2. Relevant equations

3. The attempt at a solution
I know if the currents are going the same direction they attract. So the top 2 attract each other and the bottom two attraction each other? And then the top repel the bottom...

2. Jul 21, 2017

### Staff: Mentor

Don't worry about the forces the wires exert on each other. You are asked to find the field at point P. What's the field from a current-carrying wire?

3. Jul 21, 2017

### Cici2017

Magnetic field?

4. Jul 21, 2017

### Staff: Mentor

Yes. So how do you find the magnetic field surrounding a current-carrying wire?

5. Jul 21, 2017

### Cici2017

B=F/ILsinθ
The direction is determined by right hand rule?
mmm...I don't know, what do I do next?

6. Jul 22, 2017

### Staff: Mentor

Wrong formula. Again, you are not finding the force on a current-carrying wire, but the field surrounding it.

Read this: Magnetic Field of Current