Two long parallel wires carry unequal currents in the same direction. The ratio of the currents is 3 to 1. The magnitude of the magnetic field at a point in the plane of the wires and 10 cm from each wire is 4.0 ?T. What is the larger of the two currents?

A. 5.3 A
B. 3.8 A
C. 4.5 A
D. 3.0 A
E. 0.5 A


Answer: D

Physics & Space Science

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