Solved: PHYSICS Question for NEET

NEET PHYSICSMedium

Ionized hydrogen atoms and $\alpha$ -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 :

2 : 1

1 : 2

4 : 1

1 : 4

Step-by-Step Solution

The radius of the path is $r = \frac{p}{qB}$ . For hydrogen, $q_H = e$ . For $\alpha$ -particle, $q_\alpha = 2e$ . Thus, $\frac{r_H}{r_\alpha} = \frac{p/eB}{p/2eB} = \frac{2}{1}$ .

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