A Wire Carrying a Current Is Shaped in the Form $\vec { B }$

A wire carrying a current is shaped in the form of a circular loop of radius 4.0 mm.If the $\vec { B }$ field magnitude at its center is $1.1 \mathrm { mT }$ with no external magnetic fields present,what is the magnitude of the current through the wire? (μ₀ = 4π × 10^-7 T ∙ m/A)

A) 7.0 A
B) 28 A
C) 14 A
D) 17 A

Correct Answer:

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