Chapter 19: Electric Potential Energy and the Electric Potential Section 19.1 Potential Energy Section 19.2 The Electric Potential Difference 1.Which one of the following statements is true concerning the work done by an external force in moving an electron at constant speed between two points in an electrostatic field? a) The work done is always zero joules. b) The work done is always positive. c) The work done is always negative. d) The work done depends on the total distance covered. e) The work done depends only on the displacement of the electron