ELECTRIC CURRENT AND DC CIRCUITS

ESTIMATED TIME: 2 WEEKS

Reading Assignment:
Giancoli's 5/6e: Sections 18.2, 18.3, 18.4, 18.6,  19.1, 19.2 and 19.3
Walker 2e: Sections 21.1 through 21.5

Homework:
Giancoli's 5e, Ch. 18: 7, 9, 10, 15, 29, 31, 34; Ch. 19: 6, 7, 11, 15, 21, 22,
24, 25, 26, 28, 30
Giancoli's 6e, Ch. 18: 8, 9, 11, 16, 33, 35, 37; Ch. 19: 3, 4, 11, 16, 19, 20,
23, 24, 25, 27, 29
Walker 2e Ch. 21: 2, 6, 22, 23, 24, 37, 39, 41

TEACHING RESOURCES:

DEMOS
LABS
SIMULATIONS

- Resistance
- Ohm's Law
- DC Circuits
- Mystery Circuit Box

LAB 18. Series and Parallel circuits
Objectives: To investigate the behavior of resistors in series, parallel and series-parallel circuits.
The lab should include measurements of voltage and current.
Equipment: Circuit board set, voltmeter, ammeter and batteries
Type of Lab: Open ended

LECTURE NOTES

- Batteries, and Current
- Resistance and Ohm's Law
- Series and Parallel Circuits
- Kirchhoff's Laws and Multi-loop Circuits

PROBLEM SOLVING

- Multiple Choice Interactive
3 sets of 10 interactive problems with immediate feedback.
- Electricity I
- Electricity II
- Electricity III

KEY ITEMS:

• The understanding of Ohm's Law as  'cause and effect' is very important.
These are the key points:
- A battery is a source of emf
- The battery's emf causes a potential difference (delta V) between the
  ends of the wire
- The potential difference causes an electric field in the wire
- The electric field establishes a current in the wire.
- The current depends on both the battery (delta V) and the wire (R)

• Understanding Kirchhoff's Laws is fundamental and students should apply them when solving DC circuit problems.

AP PAST EXAMINATIONS

Circuits and resistance
Multiple-Choice:
84MC18,22,23,26,27,28,57,62,64; 88MC15,40,68; 93MC13,14,15,16,20,21,22,50,51; 98MC15,16,20,65
Free-Response:
80B2,81B4,82B4,86B3,87B4,89B3,90B3,91B4,92B3,95B2,96B4,97B4,98B4,01B5, 02B3, 03B2, 03bB2, 07b3,07Bb3