The figure shows a graph for electric potential versus position along the x -axi

Question

The figure shows a graph for electric potential versus position along the x-axis. An electron is originally at point A, moving in the positive x-direction. How much kinetic energy does it need to have at point A in order to be able to reach point E (with no forces acting on the electron other than those due to the indicated potential)? Points B, C, and D have to be passed on the way.

The figure shows a graph for electric potential versus position along the x-axis. An electron is originally at point A, moving in the positive x-direction. How much kinetic energy does it need to have at point A in order to be able to reach point E (with no forces acting on the electron other than those due to the indicated potential)? Points B, C, and D have to be passed on the way.

Explanation / Answer

Since positive charge moves with decrease in potential energy and potential is greatest at point 'A' the proton will travel spontaneously from point 'A" to point 'E' So, Kinetice Energy required at 'A' = 0.

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