Q.

Ionized hydrogen atoms and α -particles with same momenta enters perpendicular to a constant magnetic field, B. The ratio of their radii of their paths rH : rα will be

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a

1 : 4

b

2 : 1

c

1 : 2

d

4 : 1

answer is B.

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Detailed Solution

r=mvqB=pqB  For given p and B,r∝1q⇒rHrα=qαqH=21
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Ionized hydrogen atoms and α -particles with same momenta enters perpendicular to a constant magnetic field, B. The ratio of their radii of their paths rH : rα will be