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

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