Q. Two particles A and B of masses mA and mB, 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 vA and vB, respectively and the trajectories are as shown in figure. Then
(a) mAυA < mBυB
(b) mAυA > mBυB
(c) mA < MB and υA < υB
(d) mA = MB and υA = υB
Ans: (b)
Sol: RA > RB
$ \displaystyle \frac{m_A v_A}{qB} > \frac{m_B v_B}{qB} $
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