GKFix MCQ Question

What is the magnetic field at the center of a circular coil of radius r₂ carrying current I₂?

• A. B = µ₀I₂/(2πr₂)
• B. B = µ₀I₂/r₂
• C. B = µ₀I₂/(2r₂)
• D. B = µ₀I₂²/(2r₂)