Summary

• Electric field & force
• Electric potential energy

• Electric potential
  • uniform field
    Example #1
    
    Example #2
    
  • point charges applet
    Example #3
    
  • video
  
  
  
  Applet that shows equipotential and field lines around point charges
  
  Applet that draws 3-d potential surfaces if you specify electrode locations

sb5 25.3
Calculate the speed of a proton accelerated from rest through 120 V.
A. 23.1 Gm/s         B. 6.49 Mm/s
C. 152 km/s          D. 120 m/s
Answer







sb5 25.10
Find the potential difference V_B - V_A for the configuration of Fig. P25.10.
A. 455 V          B. 260 V
C. 325 V          D. -325 V
Answer







sb5 25.17
What is the electric potential at the origin for the charge configuration of Fig. P25.17?
A. 400 V            B. 800 V
C. 22.5 kV          D. 45.0 kV
Answer







 



C. 152 km/s













 



B. 260 V













 



D. 45.0 kV