• Support PF! Buy your school textbooks, materials and every day products Here!

Find the direction and magnitude of the net magnetic field

  • Thread starter cy19861126
  • Start date
  • #1
69
0

Homework Statement


The two wires shown below carry currents of 5.00 A in opposite directions and are separated by 10.0 cm. Find the direction and magnitude of the net magnetic field a) at a point midway between the wires b) at point P1, 10.0 cm to the right of the wire on the right, and c) at point P2, 20.0 cm to the left of the wire on the left.

Homework Equations


B = uI/2(pi)r


The Attempt at a Solution


I got an answer for this, but I'm not sure because my instructor has never gone over vector addition in 3D nor in magnetism. Based on what I learned before, this is what I got
a) 0. because both magnetic field are at the same magnitude but opposite direction. Therefore, their magnitudes cancel and the resultant is 0

b) B = 1.26*10^-6*5.00/(2*3.14*0.1) = 1*10^-5T
B = 1.26*10^-6*5.00/(2*3.16*0.2) = 5*10^-6T
Bnet = 1*10^-5T - 5*10^-6T = 5*10^-6T out of the page
c) B = 1.26*10^-6*5.00/(2*3.14*0.2) = 5*10^-6T
B = 1.26*10^-6*5.00/(2*3.14*0.3) = 3.33*10^-6T
Bnet = 5*10^-6 - 3.3*10^-6 = 1.7*10^-6T out of page
 

Attachments

Last edited:

Answers and Replies

  • #2
340
0
How did you get the direction of the field for part a?
 
  • #3
69
0
How did you get the direction of the field for part a?
There's no direction because the two direction from the two wires cancel out. One is going into the page and another one is going out of the page
 

Related Threads on Find the direction and magnitude of the net magnetic field

Replies
2
Views
4K
Replies
5
Views
366
Replies
4
Views
533
Replies
3
Views
5K
Replies
3
Views
2K
Replies
6
Views
5K
Replies
7
Views
547
Top