Two long parallel wires lie in the xz plane. One wire passes through the point (?2 m, 0, 0) and the other through the point (+2 m, 0, 0). The wires carry equal currents in the positive z direction.
1.The magnetic field at (?3 m, 0, 0) is in the negative y direction.2.The magnetic field at (?1 m, 0, 0) is in the positive y direction.3.The magnetic field at (+1 m, 0, 0) is in the positive y direction.4.The magnetic field at (+3 m, 0, 0) is in the negative y direction.
A. 1 and 2 are correct.
B. 1 and 4 are correct.
C. 2 and 3 are correct.
D. 3 and 4 are correct.
E. None of the above are correct.
Answer: A
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