Two Long Parallel Wires Carry Currents of 20 a and 5.0

question 32

Multiple Choice

Two long parallel wires carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnitude of the magnetic field midway between the two wires? (μ0 = 4π × 10^-7 T ∙ m/A)

• A) 1.0 × 10^-5 T
• B) 2.0 × 10^-5 T
• C) 3.0 × 10^-5 T
• D) 4.0 × 10^-5 T
• E) 5.0 × 10^-5 T

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