1. 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. (26 - 3) i
+ q
conductor i
- q
conductor

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

5. (26 - 5)

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

7. + - i V
(26 -7)

8. (26 -8)

9. (26 - 9)

10. ( )

11. ( )

12. ( )

13. V
( )