ELECTRIC CHARGE AND ELECTRIC FIELD

ESTIMATED TIME: 2 WEEKS

Reading Assignment:
Giancoli's 5/6e: Sections 16.1, 16.2, 16.3, 16.4, 16.5, 16.7, and 16.8
Walker 2e: Sections 19.1 through 19.5

Homework:
Giancoli's 5e, Ch. 16: 11, 12, 13, 19, 20, 27, 29, 30, 31
Giancoli's 6e, Ch. 16: 12, 13, 14, 20, 21, 31, 33, 38, 40
Walker 2e Ch. 19: 9, 14, 20, 24, 34, 35, 36

TEACHING RESOURCES:

DEMOS
LABS
SIMULATIONS

- Van de Graaf
- Electroscope
- Sticky-Tape experiments
- Coulomb's Law
- Electric Field

LAB 15. Static Electricity Investigation
Objectives: To make qualitative observations of the behavior of an electroscope
when it is charged by conduction and by induction
Equipment: Electroscope and electrostatic materials set
Type of Lab: Open ended

LAB 16. Coulomb's Law
Objectives: To determine the charge on two spherical polystyrene balls
Equipment: Polystyrene balls, string, stand and a meterstick.
Type of Lab: Open ended

LECTURE NOTES

- Electric Charge and Coulomb's Law
- The Electric Field

PROBLEM SOLVING

- Multiple Choice Interactive
2 sets of 10 interactive problems with immediate feedback.
- Electrostatics I
- Electrostatics II

KEY ITEMS:

• When using Coulomb's Law, the signs of the charges should not be included.
They are only used to determine whether the charges are attracted or repelled.

• The concept of electric field is a difficult one for the students to fully understand.
It is important to reinforce that:
- The electric field of a source charge exists at all points in space.
- A test charge measures an electric field but does not cause it.

• When using electric field equations the signs of charges should not be included.
They are only used to map the direction of the electric field.

AP PAST EXAMINATIONS

Electrostatics, Capacitance
Multiple-Choice:
84MC 15,16,17,19,20,24,25,54,59; 88MC14,16,17,20,54,57,59; 93MC17,68,70;
98MC13,14,17,18,64,70
Free-Response:
80B5bc,81B3,83B3,85B3,87B2,88B3,89B2,90B2abcd,98B2,99B2,00B3,01B3,
02bB3,02bB5,03bB4,05B3, 05Bb3,06B3,06Bb3