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A charge particle of charge q & mass m i...

A charge particle of charge `q` & mass `m` is projected towards the center of uniformly charged ring of radius `R&` carrying a charge `Q`from a distance of `sqrt(3)R` from the center along the axis,find the minimum value of velocity of projection (in `m/s` ) so that particle reaches to `x=-oo` where `x` - axis is along the axis of ring `&` center of ring is at origin.(given `Q=6 mu c,q=3 mu c,m=` `2gm,R=1m` )

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