(A) The wire in the above figure carries a current I which travels into the pape

Question

(A) The wire in the above figure carries a current I which travels into the paper.
                                                                                                
            (True/False) The magnetic field at p1 points south.          
            (True/False) The magnetic field at p1 points out of the paper.          
            (True/False) The magnetic field at p1 points east.

(B) If the magnetic field at point p1 is 1.30

The wire in the above figure carries a current I which travels into the paper. (True/False) The magnetic field at p1 points south.(True/False) The magnetic field at p1 points out of the paper. (True/False) The magnetic field at p1 points east. If the magnetic field at point p1 is 1.30 times 10-4 tesla, what is the magnetic field at p2?

Explanation / Answer

The magnetic field at p1 points south.----> true

The magnetic field at p1 points out of the paper.----> false

The magnetic field at p1 points east.---> false

B) B(at P1)=mu*I/2*pi*a=1.3E-4 T

B(at P2)= mu*I/2*pi*2a=1.3E-4/2=0.65 E-4 T

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