In Bohr's atomic model, the electron is assumed to revolve in a circular orbit of radius $0.5 \AA$. If the speed of electron is $2.2 \times 16^6 \mathrm{~m} / \mathrm{s}$, then the current associated with the electron will be $\_\_\_\_$ $\times 10^{-2} \mathrm{~mA}$. [Take $\pi$ as $\frac{22}{7}$ ]