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