1. © 2013 Pearson Education, Inc. Planar charged electrodes guide electrons Cathode Ray Tube

2. © 2013 Pearson Education, Inc. Application of Electric Fields: E-Ink

3. © 2013 Pearson Education, Inc. An Expert in Electric Fields Electric eel

4. © 2013 Pearson Education, Inc. Field Lines Around Eel’s Body

5. © 2013 Pearson Education, Inc. Ampullae of Lorenzini: Shark Electric Field Sensors

6. © 2013 Pearson Education, Inc. Charges Influence Surrounding Space http://phet.colorado.edu/sims/charges-and-fields/charges-and-fields_en.html http://www.falstad.com/vector3de/ http://www.cco.caltech.edu/~phys1/java/phys1/EField/EField.html

7. © 2013 Pearson Education, Inc. We believe in electric fields as physically real because there is an influence that can be independent of the particle that created the field.

8. © 2013 Pearson Education, Inc. Field Lines of Electric Dipole

9. © 2013 Pearson Education, Inc.

10. If I put a charged point particle (blue dot) on a field line, then the particle will move so as to follow the field line. A True B False

11. © 2013 Pearson Education, Inc. At which point is the electric field stronger? A. Point A. B. Point B. C. Not enough information to tell.

12. © 2013 Pearson Education, Inc. Can Electric Field Vectors Cross? (A) Yes (B) No (C) No idea

13. © 2013 Pearson Education, Inc. Which is the electric field direction at the black dot? E. None of these. Slide 25-101

14. © 2013 Pearson Education, Inc. What is the direction of the electric field at the dot? E. None of these. Slide 26-22

15. © 2013 Pearson Education, Inc. Can Electric Field Lines Cross? (A) Yes (B) No (C) No idea

16. © 2013 Pearson Education, Inc. At the dot, the y -component of the electric field due to the shaded region of charge is A. B. C. D. E.

17. © 2013 Pearson Education, Inc. ABCDABCD E What is E field magnitude at point P distance y from midline of two infinite charged lines

18. © 2013 Pearson Education, Inc. Which dipole experiences no net force in the electric field? A. B. C. A.Dipole A. B.Dipole B. C.Dipole C. D.Both dipoles A and C. E.All three dipoles.

19. © 2013 Pearson Education, Inc. Which dipole experiences no net torque in the electric field? A. Dipole A. B. Dipole B. C. Dipole C. D. Both dipoles A and C. E. All three dipoles. Slide 26-90 A. B. C.