An electron, moving along the x-axis with an initial energy of 100 eV, enters a region of magnetic field 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) si :
(electron’s charge = 1.6 × 10–19C, mass of electron = 9.1 × 10–31 kg)

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R = 2.24 cm


h = 11.82 cm
cos θ = 0.45
d = h + 2(1 – 0.45) = 11.82 + 2(1 – 0.45) 12.9 cm