1. Current and Resistance
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)

2. A B
(26-2)

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

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

5. (26-5)

8. + - i V R
(26-6)

9. + - i V
(26-7)

10. (26-8)

11. (26-9)

12. (26-11)

13. (26-12)

14. V
(26-13)