The magnetic field created by the two wires shown at point $$\(A\)$$ in the figure is $$\(B_{0}\)$$ (pointing out of the page), and the two wires carry identical currents in the same direction. Which of the following is true?
A.
Both wires carry a current of \(4 \pi d / 3 \mu_{0}\) toward the top of the page.
B.
Both wires carry a current of \(4 \pi d / 3 \mu_{0}\) toward the bottom of the page.
C.
Both wires carry a current of \(4 \pi d B_{0} / \mu_{0}\) toward the top of the page.
D.
Both wires carry a current of \(4 \pi d B_{0} / \mu_{0}\) toward the bottom of the page.
E.
It is impossible for the wires to produce a magnetic field pointing perpendicular to the page.
Exam No：AP Physics C(EM) Practice Test Year：2024 Question No：14
Answer:
C
Knowledge points:
4.3 Magnetic Fields: Fields of Long Current Carrying Wires
4.4 Magnetic Fields: Biot–Savart Law and Ampère’s Law
Solution:
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