question_answer

A positively charged particle moving along x-axis with a certain velocity enters a uniform electric field directed along positive y-axis. Its                                               [AMU (Engg.) 2001]

A)            Vertical velocity changes but horizontal velocity remains constant

B)            Horizontal velocity changes but vertical velocity remains constant

C)            Both vertical and horizontal velocities change

D)            Neither vertical nor horizontal velocity changes

Correct Answer: A

Solution :

             Vertical velocity changes due to electric field, but no change in horizontal velocity.