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17/09/2020 5:01 pm
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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) 2 : 1
(3) 5 : 7
(4) 10 : 7
1 Answer
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17/09/2020 5:09 pm
Correct answer: (1) 1 : 2
Explanation:
qV = 1/2mv2
Hence v ∝1/√m
vH/vHe = √4/1 = 2 : 1