A current carrying semiconductor of thickness $0.7$ mm is placed in a transverse magnetic field. The measured Hall voltage is $0.9$ $\mathrm{mV}$ and the current is $6$ $\mathrm{mA}$. If the Hall coefficient is $4 \times 10^{-4} \mathrm{~m}^{3} / \mathrm{C}$, the value of the incident magnetic field is $\_\_\_\_$ $\mathrm{T}$. (rounded off to two decimal places)
