Electrostatics

A stream of a positively charged particles having \({q \over m} = 2 \times {10^{11}}{C \over {kg}}\) and velocity \({\overrightarrow v _0} = 3 \times {10^7}\widehat i\,m/s\) is deflected by an electric field \(1.8\widehat j\) kV/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.