A large flat metal surface has uniform charge density +σ. An electron of mass m and charge e leaves the surface at point A with speed u

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A large flat metal surface has uniform charge density +σ. An electron of mass m and charge e leaves the surface at point A with speed u, and return to it at point B. Disregard gravity. The maximum value of AB is:
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A large flat metal surface has uniform charge density +σ. An electron of mass m and charge e leaves the surface at point A with speed u, and return to it at point B. Disregard gravity. The maximum value of AB is: A large flat metal surface has uniform charge density +σ. An electron of [...]
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