Question

If an electron is placed in a uniform external electric field, then the path of the
electron is:

• A. A circle
• B. A straight line
• C. An ellipse
• D. A parabola

Answer 1

The correct option is D A parabola

While in any external field he electron moves in a parabolic path or projectile motion because the velocity of the electron in the direction perpendicular to the Electric field is constant as there is no force and hence, no acceleration along this direction, but there is an acceleration constant in that direction, in the direction of the electric field.