A stream of a positively charged particles having \(\frac qm = 2\times 10^{11} \frac C{kg}\) and velocity \(\vec {v_0} = 3 \times 10^7 \hat i\, m/s\) is deflected by an electric field \(1.8\hat jk\,V/m\). The electric field exists in a region of 10 cm along x direction. Due to the electric field, the deflection of the charge particles in the y direction is _____ mm.
