1. Electrical Potential & energy
February 2, (4.3)

2. Calendar
Today  Quiz #2
WebAssign Pile-up. Check it out … multiple assignments are due before examination.
Monday – Finish Potential, Complete experiment
WEDNESDAY - Feb 9,2011 EXAM #1
Start Capacitors./ Unit 6 (Bring to class)

3. scheduling problem I cannot do a problem session after class today.
Sudden meeting scheduled that I must attend.
I will make up for this session on MONDAY after class.
I will be available for office hours on Monday and Wednesday.
No problem solving session on Wednesday.
Next week we will go back to the schedule.

4. It’s a SATURDAY!! FINAL EXAM: Date: 04/30/11 Location: HPA 119
Time: 9:00 AM - 11:50 AM
It’s a SATURDAY!!

5. Last Time – we went mountain climbing10 20 40 30 50 A D C B
This should help you to
understand equipotentials

6. Huh???

8. Equipotential Lines

9. How do you do that??

10. Look at single sheet

11. Two Sheets

12. How do you do that??

13. To Remember:

14. The connection---
EQUIPOTENTIALS q  

15. Relationship E q DX
V V+DV

17. Today we draw the pattern
The measurMent
Today we draw the pattern

19. Point Charges Q
q=1 Coulomb 
r infinity

20. The three charges in the diagram are at the vertices of an isosceles triangle. Calculate the electric potential at the midpoint of the base, taking q = 7.00 μC.

21. Derive an expression in terms of q2/a for the work required to set up the four-charge configuration in the figure, assuming the charges are initially infinitely far apart. 1 2 3 4

22. The drawing shows four point charges. The value of q is 2
The drawing shows four point charges. The value of q is 2.00 µC, and the distance d is 1.00 m. Find the total potential at the location P. Assume that the potential of a point charge is zero at infinity.