The Figure Shows Two Long, Parallel Current-Carrying Wires

question 54

Multiple Choice

The figure shows two long, parallel current-carrying wires. The wires carry equal currents I₁ = I₂ = 20 A in the directions indicated and are located a distance d = 0.5 m apart. Calculate the magnitude and direction of the magnetic field at the point P that is located an equal distance d from each wire.
(μ₀ = 4π × 10^-7 T ∙ m/A)

• A) 8 µT downward
• B) 8 µT upward
• C) 4 µT downward
• D) 4 µT upward
• E) 4 µT to the right

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