1. C H A P T E R   19
Electric Potential Energy and the Electric Potential

2. 19.1 Potential Energy
Gravitational Potential Energy

3. 19.1 Potential Energy
Gravitational Potential Energy
WAB = GPEA - GPEB

4. 19.1 Potential Energy
WAB = GPEA - GPEB
WAB = EPEA - EPEB

5. 19.2 The Electric Potential Difference
WAB = EPEA - EPEB

6. Definition of Electric Potential
The electric potential V at a given point is the electric potential energy EPE of a small test charge q0 situated at that point divided by the charge itself:
SI Unit of Electric Potential: joule/coulomb = volt (V)

7. The Electric Potential Difference
WAB = EPEA - EPEB

8. Problem 7, Page 599
In a television picture tube, electrons strike the screen after being accelerated from rest through a potential difference of V. The speeds of the electrons are quite large, and for accurate calculations of the speeds, the effects of special relativity must be taken into account. Ignoring such effects, find the electron speed just before the electron strikes the screen.

9. Electron Volt (eV)
One electron volt is the amount by which the potential energy of an electron (q0 = 1.60×10-19 C) changes when the electron moves through a potential difference of one volt.
It is a unit of energy.
1 eV = 1.60×10-19 J

10. 19.3 The Electric Potential Difference Created by Point Charges

11. Potential of a point charge

12. Potential Sketch