A straight horizontal length of copper wire has a current of 28 A through it. Find the magnitude of the minimum magnetic field needed to suspend the wire. The linear density of the wire is 46.6g/m

• A.1.6 × 10^-2T
• B.1.5 × 10^-2T
• C.1.4 × 10^-2T
• D.1.3 × 10^-2T