PHY 182, Spring, 2005

Week 8

 

  Main Objectives:
  • Be able to discuss the the meaning of resistance and resistivity.
  • Be able to apply conservation of energy to situations involving electric potential energy
  • Be able to calculate the electric potential difference for charges moving in uniform electric fields and in the electric field of a point charge
  • Be able to calculate the electric potential difference for continuous distributions of charges by using the electric field of the distribution and by integrating over the charge distribution.
  • Be able to find the electric field of a charge distribution from the electric potential.
  • Be able to use Ohm's law and know in what circumstances it is applicable.
  • Be able to state Kirchoff's laws and be able to explain how they are related to conservation of charge and conservation of energy.
Tuesday Finish up anything leftover from Friday.  Introduction to electric potential energy and potential difference. Group work using energy bar charts

Outside of class:  Read Ch. 29.   Complete Ch. 29 workbook exercises 2, 3, 5, 7, 9, 13, 15, and 17. Complete Ch. 28 homework: 18, 21, 37, 44 and 52. (Due Thursday)

Thursday Continue to discuss electric potential difference.  Do examples of calculating V of continuous charge distributions.  Revisit spherical charge distributions thinking about electric potential this time.

Outside of class:  Read Ch. 30 Sec. 1-5.  Complete Ch. 30 workbook exercises 1, 2, 17, 19, and 21.   Complete Ch 29 homework: 1, 6, 19, 27 and 40. (Due Friday)

Friday Discuss the connection between potential difference and electric field.   Introduction to resistance, Ohm's Law, and Kirchoff's laws..

Outside of class:  Read Ch. 30 Sec. 6-7.  Complete Ch. 30 workbook exercises 23 and 27.   Complete Ch. 29 homework problems:69 and 71.  Complete Ch. 30 homework problems: 2, 6, 13, 16, 18, 38, 42b, 45, and 50.  (All due Tuesday) Note that Ch. 29 #69 is the same as Ch. 30 #42a, so you don't have to do it again.