Two long, straight, parallel wires are a distance d apart. Wire A carries a current of I, Wire B carries a current 2I. The ratio of the force on Wire A to the force on Wire B is ( )
A、1:4
B、1:2
C、1:1
D、2:1
E、4:1
发布时间：2026-01-07 07:56:51
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答案：1:1
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