A current of \(2\;A\)flows in a long, straight wire of radius \(2\;mm\). The intensity of magnetic field on the axis of the wire is ( )
A. \({\left(\frac{{\mu_{{{0}}}}}{{\pi}}\right)}\times{10}^{{{3}}}\) Tesla
B. \({\left(\frac{{\mu_{{{0}}}}}{{{2}\pi}}\right)}\times{10}^{{{3}}}\) Tesla
C. \({\left(\frac{{{2}\mu_{{{0}}}}}{{\pi}}\right)}\times{10}^{{{3}}}\) Tesla
D. Zero