1. 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

2. Mar 30 Today’s Activities -AP Practice Questions #6 -AP Practice Questions #7 -Electricity Background knowledge Homework: AP Practice Questions due Apr 12 Electricity Answers: 1.45V 2.2A 3.100Ω 4.3960W 5.Parallel, combination, series Gravitational potential energy answer: 5.4x10 10 J Incorrectly using mgΔy you would get 9.8x10 9 J

3. 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? Apr 11 Today’s Activities -Electricity Notes – Coulomb’s and Ohm’s Laws, Power, Resistivity -Practice problems Homework: AP Practice Questions (both sets) due tomorrow

4. 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? Apr 12 Today’s Activities -Finish 18-5. Last slide of notes. -Simple Circuits Lab Homework: Lab due at beginning of class tomorrow AP Practice due Apr 22 Electricity Quiz on April 20 AP Academy Next week: Tuesday: Take practice test Thursday: In-detail look at the answers Ch 11-12 Test Corrections due Apr 20 (scores under 75% raised up to 75%)

5. For the lab: 1 battery 3 light bulbs 3-4 wires Multitmeter (ammeter and voltmeter) Directions for multimeter Parallel Series

6. Question of the Day #58 18-8. Calculate the resistance of a 40W car headlight designed for a 12V battery. Apr 13 Today’s Activities -Correct AP practice packets -Coulomb’s Law, Resistivity, Ohm’s Law Practice Problems Homework Assignment Homework: Coulomb’s Law, Resistivity, Ohm’s Law Practice Problems due Friday AP Practice due Apr 22 Electricity Quiz on April 20 AP Academy Next week: Tuesday: Take practice test Thursday: In-detail look at the answers

7. No QD today Apr 14 Today’s Activities -DC Circuit Notes Homework: Coulomb’s Law, Resistivity, Ohm’s Law Practice Problems due tomorrow AP Practice due Apr 22 Electricity Quiz on April 20 AP Academy Next week: Tuesday: Take practice test Thursday: In-detail look at the answers

8. 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 AP Practice due Apr 22 Electricity Quiz on April 20 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

9. Question of the Day #59b

10. 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. Apr 18 Today’s Activities -Correct Friday’s homework -Finish Phet Circuits and Kirchoff’s Rules – due by end of class today 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

11. 1.9x10 9 N 2.879N 3.-0.0033C 4.2.24x10 -5 C 5.F E = 8.2x10 -8 N F g = 3.6x10 -47 N 6.-6.08x10 -10 C 7.-1.7x10 -10 C 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

12. 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.