A beam of electrons travels at $3 \times 10^{6} m/s$ through a uniform magnetic field of $4 \times
10^{-2} T$ at right angles to the field, as shown in the figure. How strong is the force acting on each electron?

Question

$\begin{array}{1 1} (A) -1.9 \times 10^{-14} N \\(B) -1.6 \times 10^{-19} N \\ (C) -12 \times 10^{-14} N \\ (D) -4.8 \times 10^{-14} N\end{array}$