Magnetics

A charge of \(4.0 \mu \mathrm{C}\) is moving with a velocity of \(4.0 \times 10^6 \mathrm{~ms}^{-1}\) along the positive \(y\) axis under a magnetic field \(\vec{B}\) of strength \((2 \hat{k}) \mathrm{T}\). The force acting on the charge is \(x \hat{i} N\). The value of \(x\) is __________.