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Uniform electric field: point charge and potential difference

Location A is 4 m to the LEFT of a point charge of 0.3 μC. Location B lies on the same line and is to the RIGHT of the charge. The potential difference VB - VA = 100 V. How far is Location B from the point charge?

A uniform electric field has a magnitude of 2 x 103 N/C. In a vacuum, a proton begins with a speed of 4 x 104 m/s and moves in the opposite direction of this field. Find the distance the proton travels before coming to rest.

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Solution Summary

Solution provides detailed explanation of how to find point charges, as well as distance a proton travels. Examples provided.