First slide
Force on a charged particle moving in a magnetic field
Question

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 trajectories are as shown in fig

Then

Easy
Solution

We know that m v = Bqr
From given figure, rA > rB
 mAvA>mBvB

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