An electron, moving along the x-axis with an initial energy of 100 eV, enters a region of magnetic field  $\vec{B}=\left(1.5\times {10}^{-3}T\right)\hat{k}$ at S (See figure). The field extends between x = 0 and x = 2 cm. The electron is detected at the point Q on a screen placed 8 cm away from the point S. The distance d between P and Q (on the screen) is

(electron’s charge = 1.6 × 10^–19 C, mass of electron = 9.1 × 10^–31 kg)