A proton and an alpha particle of the same enter in a uniform magnetic field which is acting perpendicular to their direction of motion. The ratio of the circular paths described by the alpha particle and proton is ....
JEE MAIN 2022, Medium
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$\frac{ R _{\alpha}}{ R _{ P }}=\frac{ M _{\alpha}}{ M _{ P }} \times \frac{ q _{ p }}{ q _{\alpha}}$
$\frac{ R _{\alpha}}{ R _{ p }}=\frac{4}{1} \times \frac{1}{2}=2$
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