Proton, deuteron and alpha particle of same kinetic energy are moving in circular trajectories in a constant magnetic field. The radii of proton, deuteron and alpha particle are respectively $r_p, r_d$ and $r_{\alpha}$ Which one of the following relation is correct?
AIEEE 2012,IIT 1997, Medium
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$r=\frac{\sqrt{2 m v}}{q B} \Rightarrow r \times v \frac{\sqrt{m}}{q}$
Thus we have, ${r_p} < {r_d}$
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