A Wire Carrying a Current Is Shaped in the Form $1.1 \mathrm { mT }$

question 142

Multiple Choice

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

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

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