A charged particle
+q of mass
m is placed at a distance
d from another charged particle
−2q of mass
2m in a uniform magnetic field of induction vector
B with direction into the plane of paper (as shown in figure). If particles are projected towards each other with equal speeds
V0, the maximum value of the projection speed
V0, so that the two particles do not collide is :
(Assume only magnetic force of interaction between particles)