A thin, spherical, conducting shell of radius R is mounted on an isolating support and
Chapter 24, Problem 48(choose chapter or problem)
A thin, spherical, conducting shell of radius R is mounted on an isolating support and charged to a potential of 125 V. An electron is then fired directly toward the center of the shell, from point P at distance r from the center of the shell . What initial speed v0 is needed for the electron to just reach the shell before reversing direction?
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