If the areas are A1 and A-A1.

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If the areas are A1 and A-A1. C123 2.4 \muF, q = 28.8 \muC C2 C24 = 12 \muF C1234 = 3 \muF q =36 \muC

Chapter 26 Current and Resistance In this chapter we will introduce the following new concepts: -Electric current ( symbol i ) -Electric current density vector (symbol ) -Drift speed (symbol vd ) -Resistance (symbol R ) and resistivity (symbol ρ ) of a conductor -Ohmic and non-Ohmic conductors We will also cover the following topics: -Ohm’s law -Power in electric circuits (26 - 1)

HITT The plate areas and plate separations of five parallel plate capacitors are capacitor 1: area A0, separation d0 capacitor 2: area 2A0, separation 2d0 capacitor 3: area 2A0, separation d0/2 capacitor 4: area A0/2, separation 2d0 capacitor 5: area A0, separation d0/2 Rank these according to their capacitances, least to greatest. a. 1,2,3,4,5 b. 5,4,3,2,1 c. (524) (13) d. (412) (53) e. 3,5, (1,2), 4 d

A B (26 - 2)

(26 - 3) i + q conductor i - q conductor

i + q conductor A i - q conductor A (26 - 4)

(26 - 5)

+ - i V R (26 - 6)

+ - i V (26 -7)

(26 -8)

(26 - 9)

(26 - 10)

(26 - 11)

(26 - 12)

V (26 - 13)

hitt To store a total of 0.040 J of energy in the two identical capacitors shown, each should have a capacitance of: A. 0.10 \muF B. 0.50 \muF, 0.10 \muF C. 1.0 \muF D. 1.5 \muF E. 2.0 \muF