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Two Long Parallel Wires Carry Currents of 10 a in Opposite

Question 44

Multiple Choice

Two long parallel wires carry currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20 cm from one wire and 60 cm from the other?


A) 1.5 × 10-6 T
B) 3.3 × 10-6 T
C) 6.7 × 10-6 T
D) 3.3 × 10-5 T
E) 6.7 × 10-5 T

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