Concept explainers
The particle travels from point X to point Z along the circular are shown.
1. Is the work done by the electric field on the particle positive, negative, or zero? Explain. (Hint: Sketch the direction ofthe force on the particle and the direction of the displacement for several short intervals during the motion.)
2. Compare the work done by the electric field when the particle travels from point X to that done when the particle travels from point W to point Z along the path shown. Explain.
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