Answer:
[tex]I=195A[/tex]
Explanation:
According to the Biot–Savart law, the magnitude of a magnetic field created by the current in a long straight wire, is defined as:
[tex]B=\frac{\mu_0I}{2\pi R}[/tex]
Where [tex]\mu_0[/tex] is the permeability of free space, I is the current circulating on the wire and R is the distance from the point where B is measured.
Solving for I:
[tex]I=\frac{2\pi BR}{\mu_0}\\I=\frac{2\pi(1.3*10^{-3}T)(0.03m)}{4\pi*10^{-7}\frac{T\cdot m}{A}}\\I=195A[/tex]
