The magnetic field for each semi-circle is given by:
Let's take the magnetic field on the inner semi-circle to be B1 and that on the outer semicircle to be B2.
You may want to review (Page 796).
For help with math skills, you may want to review:
What is the strength of the magnetic field at point P in the figure? Assume that I = 5.2 A , r1 = 1.1 cm , and r2 = 2.2 cm .
What is the direction of the magnetic field at point P in the figure?
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