The kinetic energy of an electron moving in a circular orbit of radius r about a positive charge Ze varies A)directly with r. B)directly with r². C)indirectly with r. D)indirectly with r². E)indirectly with r^1/2.

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Quizplus · Accepted Answer

The kinetic energy of an electron in a circular orbit is inversely proportional to the radius r because the centripetal force required for circular motion is provided by the electrostatic force, which decreases with increasing r.

The Kinetic Energy of an Electron Moving in a Circular