Hydrogen ion and singly ionized helium atom are accelerated, from rest, through the same potential…

Hydrogen ion and singly ionized helium atom are accelerated, from rest, through the same potential difference. The ratio of final speeds of hydrogen and helium ions is close to:
  1. 1 : 2
  2. 10:7
  3. 2:1
  4. 5:7

Solution

qV=12mv2

Hence v1m

VHVHe=41=2:1

Asked in: JEE Main 2020 (03 Sep Shift 2)

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