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[" Surface.Find the magnitude and direct...

[" Surface.Find the magnitude and direction of the electric field strength vector on the z-axis."],[" A positive charge Q is uniformly distributed throughout the volume of a dielectric sphere of radius R.A point mass "],[" having charge t qand mass mis fired towards the centre of the sphere with velocity v from apoint at distance x from the "],[" ceesstance of the splere.Find the minimum volocity vso that it capentate "R/2" distance of the sphere.Neglect any "],[" resistance other than electric interaction.Charge on the smail mastance throughout the motion."]

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