If a proton, a deuteron and an alpha particle, on being accelerated by the same potential difference, enter perpendicularly to a magnetic field. The ratio of their respective kinetic energies is

Options

(a) 1 : 2 : 2
(b) 2 : 2 : 1
(c) 1 : 2 : 1
(d) 1 : 1 : 2

Correct Answer:

1 : 1 : 2

Explanation:

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