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

question 71

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? (?₀ = 4? × 10^-7 T ? m/A)

• A)7.0 A
• B)28 A
• C)14 A
• D)17 A

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