An electron projected with velocity −v=v₀î in the electric field E=E₀ĵ. Trace the path followed by the electron.

The acceleration of the electron will be −eE/mĵ. This is a constant acceleration. The motion will be analogous to a mass projected horizontally with velocity v₀ with gravity acting in the vertical direction. We know that motion of such a mass is a parabola. Hence, correct option is A.