Mar 30
Today’s Activities
-AP Test Must Memorize and Gravitational
Potential Energy
-Electricity Background Knowledge
-AP Practice Questions set #6
Tomorrow’s Activities
-AP Practice Questions #6
-AP Practice Questions #7
-Electricity Background knowledge
Homework:
AP Practice Questions due Apr 12
Mar 30
Today’s Activities
-AP Practice Questions #6
-AP Practice Questions #7
-Electricity Background knowledge
Electricity Answers:
1. 45V
2. 2A
3. 100Ω
4. 3960W
5. Parallel, combination, series
Homework:
AP Practice Questions due Apr 12
Gravitational potential energy answer: 5.4x1010J
Incorrectly using mgΔy you would get 9.8x109J
Apr 11
Question of the Day #57
A circuit has a total resistance of 2.5Ω with a 9V battery. What is the
current running through the circuit? How much power is used in this
circuit?
Today’s Activities
-Electricity Notes – Coulomb’s and Ohm’s
Laws, Power, Resistivity
-Practice problems
Homework:
AP Practice Questions (both sets)
due tomorrow
Apr 12
No QD today
18-5. Suppose you want to connect your stereo to speakers that will be
placed far away from the stereo. A)If each wire must be 20m long, what
diameter wire do you need to keep the resistance less than 0.10Ω if the
resistivity of copper is 1.68x10-8 Ωm? B) If the current to each speaker is
4.0A, what is the voltage drop across each speaker?
Today’s Activities
-Finish 18-5. Last slide of notes.
-Simple Circuits Lab
Electricity Quiz on April 20
AP Academy Next week:
Tuesday: Take practice test
Thursday: In-detail look at the answers
Homework:
Lab due at beginning of class
tomorrow
AP Practice due Apr 22
Ch 11-12 Test Corrections due Apr 20
(scores under 75% raised up to 75%)
For the lab:
1 battery
3 light bulbs
3-4 wires
Multitmeter (ammeter and voltmeter)
Directions for multimeter
Parallel
Series
Apr 13
Question of the Day #58
18-8. Calculate the resistance of a 40W car headlight designed for a 12V
battery.
Today’s Activities
-Correct AP practice packets
-Coulomb’s Law, Resistivity, Ohm’s Law
Practice Problems Homework Assignment
Electricity Quiz on April 20
AP Academy Next week:
Tuesday: Take practice test
Thursday: In-detail look at the answers
Homework:
Coulomb’s Law, Resistivity, Ohm’s
Law Practice Problems due Friday
AP Practice due Apr 22
Apr 14
No QD today
Today’s Activities
-DC Circuit Notes
Electricity Quiz on April 20
AP Academy Next week:
Tuesday: Take practice test
Thursday: In-detail look at the answers
Homework:
Coulomb’s Law, Resistivity, Ohm’s
Law Practice Problems due
tomorrow
AP Practice due Apr 22
Question of the Day #59a
Apr 15
Today’s Activities
-Phet Circuits and Kirchoff’s Rules
Homework:
Phet due by end of class Monday
DC Circuit homework due Apr 20
Electricity Quiz on April 20
AP Practice due Apr 22
AP Academy this week:
Tuesday: Take practice test and/or electricity help
Wednesday tutorial: Electricity help
Thursday: In-detail look at the answers and study guide
Question of the Day #59b
Question of the Day #60
19-6. The circuit here has 3 identical bulbs.
A)When the switch is closed, how will the
brightness of bulbs A and B compare with that
of C? B)What happens when the switch is
opened? Answer in terms of brightness
compared to before.
Today’s Activities
-Correct Friday’s homework
-Finish Phet Circuits and Kirchoff’s
Rules – due by end of class today
Apr 18
Homework:
DC Circuit homework due Apr 20
AP Practice due Apr 22
Electricity Quiz on Wednesday!
AP Academy this week:
Tuesday: Take practice test and/or electricity help
Wednesday tutorial: Electricity help
Thursday: In-detail look at the answers and study guide
1. 9x109N
2. 879N
3. -0.0033C
4. 2.24x10-5C
5. FE = 8.2x10-8N Fg = 3.6x10-47N
6. -6.08x10-10C
7. -1.7x10-10C
8. 1.5Ω
9. 9.4x10-7Ωm
10.25m
11. 0.0014m
12. ½ R Ω
13. 9 R Ω
14. 16V
15. 30A
16. 2A
19. a)FE b)AB c)none d)AB
20. 21W
21. 6.48W
17. C
25. AD
15. C
Quiz on Wednesday
Know your series and parallel circuit rules!
Know how to make the VIR chart as in #1-7 on DC circuits homework and the Phet
lab
Know where and how ammeter and and voltmeters should be hooked into
circuits as in the handout and Phet lab
Know how to calculate electric force and gravitational force and compare. (know
where to find constants, masses, charges on equation sheet)
Know how to calculate resistance, length, resistivity, cross sectional area when
given certain values.
Know how to convert between the fundamental charge and coulomb’s
Be able to analyze the brightness of bulbs in a circuit, voltage drops, power
dissipated, etc.