Concept #1: Work due to Electric Force
Practice: An electron moves from point A to point B. The potential difference between these two points is 100 V. What is
a. the point of higher potential?
b. the work done on the electron?
c. the final speed of the electron if its initial speed is zero?
Example #1: Work to Bring Two Charges From Infinity
Practice: What work is needed to assemble an equilateral triangle of side length 5 cm, with a 5µC charge at each vertex?
Example #2: Speed of Electron in Electric Field