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)

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

+ -_ 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)