How Much Work Must We Do on an Electron to Move

question 77

Multiple Choice

How much work must we do on an electron to move it from point A, which is at a potential of +50V, to point B, which is at a potential of -50 V, along the semicircular path shown in the figure? Assume the system is isolated from outside forces. (e = 1.60 × 10^-19C)

• A) 1.6 J
• B) 1.60 × 10^-17 J
• C) -1.60 × 10^-17 J
• D) -1.6 J
• E) This cannot be determined because we do not know the distance traveled.

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Definitions:

Muscle Movement

The physiological process by which muscles contract and relax, enabling the body to move.

Tibia and Fibula

The two long bones in the lower leg, where the tibia, or shinbone, supports most of the body's weight and the fibula, or calf bone, supports muscles and stabilizes the ankle.

Ascend and Descend

To move upward and downward respectively; in health terms, it can refer to the movement of substances or effects within the body or an individual's health status.

Three-point Gait

A method of walking with crutches where one leg and both crutches touch the ground simultaneously, mimicking a three-point stance.