# Finding the Magnitude and Direction of Magnetic Field of 2 parallel wi

1. Feb 14, 2013

### physicshelpnow

1. The problem statement, all variables and given/known data
Two long, parallel wires carry currents of I1 = 2.78 A and I2 = 4.80 A in the direction indicated in the figure below. (Choose the line running from wire 1 to wire 2 as the positive x-direction and the line running upward as the positive y-direction.)

a) Find the magnitude and direction of the magnetic field at a point midway between the wires (d = 20.0 cm).

(b) Find the magnitude and direction of the magnetic field at point P, located d = 20.0 cm above the wire carrying the 4.80-A current.

2. Relevant equations

F=BILsin(theta) not sure if that is the one to even use

3. The attempt at a solution
tried plugging in the numbers in the above equation, but not working. Help is greatly appreciated!

Last edited: Feb 14, 2013
2. Feb 14, 2013

### Staff: Mentor

Re: Finding the Magnitude and Direction of Magnetic Field of 2 paralle

Welcome to the PF.

Can you scan or take a picture of the figure and upload it as an attachment? That would help us help you with this.