Atoms And Nuclei

In Bohr's atomic model, the electron is assumed to revolve in a circular orbit of radius 0.5 \(\mathop A\limits^o\). If the speed of electron is 2.2 \(\times\) 16⁶ m/s, then the current associated with the electron will be _____________ \(\times\) 10^\(-\)2 mA. [Take \(\pi\) as \({{22} \over 7}\)]