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Homework Statement
I got 1/2 of this problem right, but I am not sure of the other part. I have attached the picture. The questions are as follows (with the answers that I am sure of) 
What is the magnetic field strength at point 1 in the figure?
What is the magnetic field direction at point 1 in the figure? (out of the page)
What is the magnetic field strength at point 2 in the figure?
What is the magnetic field direction at point 2 in the figure? (in to the page)
What is the magnetic field strength at point 3 in the figure?
What is the magnetic field direction at point 3 in the figure? (out of the page)
Homework Equations
B = permeability constant * I/ 2(pi)r
The Attempt at a Solution
Well, for the first one example, this is what I did.
(1.257*10e6)*(10)/2(pi)(.02m) = 1*10e4
This is not correct however? Can someone give me some instruction? And for the second and third ones, which wire am I calculating from?
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