Chapter 25 Capacitance In this chapter we will cover the following topics: -Capacitance C of a system of two isolated conductors.

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Presentation transcript:

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)

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

+ -_ V (25 - 3)

-q +q (25 - 4)

V+ V- (25 - 5)

S P N (25 - 6)

S (25 - 7)

S (25 - 8)

(25 - 9)

(25 - 10)

(25 - 11)

(25 - 12)

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

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

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

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

q conductor dielectric (25 - 17)

(25 - 18)

(25 - 19)

S (25 - 20)

(25 - 21)