An electron, moving along the x-axis with an initial energy of 100 eV, enters a region of magnetic field $\overrightarrow B = \left( {1.5 \times {{10}^{ - 3}}T} \right)\widehat k$ 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)