1. Chapter 25
Capacitance
In this chapter we will cover the following topics:
-Capacitance C of a system of two isolated conductors Calculation of the capacitance for some simple geometries Methods of connecting capacitors (in series, in parallel) Equivalent capacitance Energy stored in a capacitor Behavior of an insulator (a.k.a. dielectric) when placed in the electric field created in the space between the plates of a capacitor Gauss’ law in the presence of dielectrics.
(25-1)

2. ) V+ V- V q O
q = CV
(25-2)

3. + -_ V
(25-3)

4. -q +q
(25-4)

5. V+ V-
(25-5)

6. S P N
(25-6)

7. S
(25-7)

8. S
(25-8)

9. (25-9)

10. (25-10)

11. (25-11)

12. (25-12)

13. - +
dq' q'
-q' V' q' q V' V
Charge
Voltage O A B
(25-13)

14. - + q -q d A
(25-14)

15. q -q q'
-q' V V'
(25-15)

16. q -q q'
-q' V V'
(25-16)

17. q
conductor
dielectric
(25-17)

18. (25-18)

19. (25-19)

20. S
(25-20)

21. (25-21)