An electron is in a close proximity to a negative ion. The electron moves away with kinetic energy that comes from conversion of electric potential energy of an electron near a negative ion.

Question

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When an electron is in close proximity to a negative ion, they repel each other due to their like charges. As the electron moves away, the electric potential energy, which is high due to the repulsive force between the electron and the negative ion, is converted into kinetic energy, causing the electron to move away with increased speed.

An Electron Is in a Close Proximity to a Negative