Magnetics

A 2A current carrying straight metal wire of resistance \(1 \Omega\), resistivity \(2 \times 10^{-6} \Omega \mathrm{m}\), area of cross-section \(10 \mathrm{~mm}^2\) and mass \(500 \mathrm{~g}\) is suspended horizontally in mid air by applying a uniform magnetic field \(\vec{B}\). The magnitude of B is ________ \(\times 10^{-1} \mathrm{~T}\) (given, \(\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^2\)).