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two concentric rings are placed in gravity free region in yz plane. one of radius carries charge+Q and second of radius 4r carries charge -8Q distributed uniformly over it.find minimum velocity with which a point charge of mass m and charge -Q be projected from a point a istance 3r from centre of ring on its axis so that it will reach to the centre of ring?

two concentric rings are placed in gravity free region in yz plane. one of radius carries charge+Q and second of radius 4r carries charge -8Q distributed uniformly over it.find minimum velocity with which a point charge of mass m and charge -Q be projected from a point a istance 3r from centre of ring on its axis so that it will reach to the centre of ring?

Grade:12

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