Eduprobe
Question:
Which of the following statements is correct?
The balls will execute simple harmonic motion between the two plates
The balls will bounce back to the bottom plate carrying the opposite charge they went up with
The balls will bounce back to the bottom plate carrying the same charge they went up with
The balls will stick to the top plate and remain there
Solution:
Balls placed on the positive plate become positively charged and move upward due to the electric field. These balls, on colliding with the negative plate, become negatively charged and move opposite to the direction of the electric field. Answer is option D.