Consider the parallel-plate capacitor shown in the figure. An electron is positi

Question

Consider the parallel-plate capacitor shown in the figure. An electron is positioned halfway between the plates and is given some initial velocity U V. If the electron has half the speed needed to reach the negative plate, it wil turn around and go towards the starting plate. Starting from its initial position in the center the potential energy of the electron +capacitor system increases up to a maximum and then decreases B. decreases to a minimum and then increases increases D. E. remains constant

Explanation / Answer

E) Remains constant.

By energy conservation, the total energy of the system remains constant.

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