Electron motion in uniform electric field

Steps:

• Identify the electric field direction: uniform field points from positive to negative plate (diagram needed for polarity).
• Determine force on electron: F = qE, where q is negative for electron, so force opposes field direction.
• Calculate acceleration: a = F/m, constant magnitude in uniform field, direction based on force.
• Analyze motion: if at rest, constant acceleration in force direction; no initial velocity specified.

Not enough information: No diagram provided to determine field direction or initial conditions.

Why A is correct: Not applicable without diagram; assumes downward motion with zero acceleration, possibly if no net force or balanced.

Why the others are wrong:

• B: Constant acceleration expected, but direction unknown.
• C: Upward zero acceleration implies no force, incorrect for charged particle in field.
• D: Decreasing acceleration not possible in uniform field.

Final answer: Not enough information.