An electron falls from rest through a vertical distance h in a uniform and vertically upward directe

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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 :-

Accepted Answer

S = ut + 12at2 h = 0 + 12qEmt2&#8658;t=2hmqE&#160;&#8658;&#160;t&#160;&#8733;m as mass of proton is heavier than electron, hence electron will take less time.

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