Two particles $A$ and $B$ of masses ${m_A}$ and ${m_B}$ respectively and having the same charge are moving in a plane. A uniform magnetic field exists perpendicular to this plane. The speeds of the particles are ${v_A}$ and ${v_B}$ respectively, and the trajectories are as shown in the figure. Then
IIT 2001, Medium
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(b) $r = \frac{{mv}}{{qB}} \Rightarrow r \propto mv$ ($q$ and $B$ are constant)
$\because \;{r_A} > {r_B} \Rightarrow {m_A}{v_A} > {m_B}{v_B}$
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