Field of a Circular Loop: as Shown in the Figure

question 81

Multiple Choice

Field of a circular loop: As shown in the figure, an insulated wire is bent into a circular loop of radius 6.0 cm and has two long straight sections. The loop is in the xy-plane, with the center at the origin. The straight sections are parallel to the z-axis. The wire carries a current of 8.0 A. What is the magnitude of the magnetic field at the origin? (μ₀ = 4π × 10^-7 T ∙ m/A)

• A) 75 µT
• B) 81 µT
• C) 88 µT
• D) 110 µT
• E) 120 µT

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