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

A

`1 :4`

B

`2:1`

C

`1:2`

D

`4:1`

Text Solution

Verified by Experts

The correct Answer is:
B
`r =(mv)/(qB) = (p)/(qB)`
For given p and B ,`r prop (1)/(q)`
`(r_H)/(r_alpha) = (q_alpha)/(q_H) = 2/1`
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