Wires and Magnetic Field

Discussion in 'Homework Help' started by f74bat, Dec 1, 2008.

  1. f74bat

    Thread Starter Member

    Nov 26, 2008
    Two long, straight wires separated by a distance d1 = 0.140 m carry currents of I1 = 10.0 A and I2 = 3.50 A as shown below.


    What is the magnitude of the magnetic field at point P located a distance d2 = 0.130 m from the second wire as shown?

    I have no idea how to attempt this one..I thought about B=(mu*I)/(4*pi*r) but i have two I's and two d's so i thought about putting them equal to one another but the B's will cancel out and that is what I need.
  2. mik3

    Senior Member

    Feb 4, 2008
    As, I told you in your other post, calculate B each wire creates at this point and then add them to get the total B. The distance of the right wire is d2 and the distance of the left wire is d1+d2.