Question

An electron falls from rest through a vertical distance h in a uniform and vertically upward directed electric field E. The direction of electrical field is now reversed, keeping its magnitude the same. A proton is allowed to fall from rest in through the same vertical distance h. The time fall of the electron, in comparison to the time fall of the proton is :- 

(1) smaller 

(2) 5 times greater 

(3) 10 times greater 

(4) equal

Answer 1

as mass of proton is heavier than electron, hence electron will take less time.