Four long parallel wires each carry 2.0 A in the same direction. They are parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positioned in the x-y plane. What magnetic field does one of the wires experience due to the other wires?单项选择题

题目图片
A

1.2 × 10−6 T

B

2.1 × 10−6 T

C

1.2 × 10−5 T

D

2.1 × 10−5 T

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