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  4. 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

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Q. 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 figure, thenPhysics Question Image

Solution:

Radius R = $\frac{mv}{Bq} \, i.e. \, R \propto mV$ if B and $q$ are fixed
As radius of A > radius of B $\therefore $ $m_Av_A > m_B v_B$