1. Electrical Circuits Targeted Skills for Circuits 1.Define: voltage, current, resistance, power, and Ohm's Law. 2. Qualitatively analyze series, parallel and combination circuit problems

2. Electrical Circuits Targeted Skills for Circuits 3. Draw schematic diagrams. 4. Construct a circuit and properly wire an ammeter and voltmeter. 5. Solve series, parallel and combination circuit problems.

3. Draw orientations that result in the bulb lighting. Draw the inner workings of a light bulb. Introduction Lab – Post Lab

4. Conductors and Insulators Definitions: Conducting Path Polarity

5. Definitions Conducting Path Polarity

6. Types of Connections: Series Connection Parallel Connection

7. Schematic Diagram Elements Wire Resistor Bulb

8. Schematic Diagram Elements Battery Switch

9. Power Polarity Definition Equations:

10. Bulb brightness - PreLab

11. Bulb brightness – Post Lab

12. Qualitative Circuit Analysis

13. Example #1 A 60 W light bulb is accidentally left on in the attic when you put Christmas ornaments away. If the bulb is left on until the following Christmas and doesn’t burn out, how much energy does the bulb use in the intervening year? G: P=60 W, T= 1 yr, $= $0.08 per kW hr U: Cost per year = _____ E: P = W/T S: See Overhead If the electric company charges $0.08 per kW hr, how much did you forgetfulness cost your parents?

14. Meters Definitions Current Conventional Electron Flow

15. Meters Ammeter Voltmeter

16. Meters Series Connection Parallel Connection

17. Schematic Diagram Elements Ammeter Voltmeter

18. Bulbs Reading Lab - PreLab Definitions Power

19. Bulbs Reading Lab - PostLab

20. Kirchoff’s Laws Loop Law

21. Kirchoff’s Laws Junction Law

22. Ohm’s Law PreLab Purpose Hypothesis Sketch

23. Ohm’s Law PreLab You will have the entire class period to collect and begin your data analysis. The completed lab report is due the next class period. You will be given 20 minutes to write your in-class conclusion at the first of the next class period. You may use your lab report to assist you in your writing as well as the teacher provided copy of the conclusion format sheet (example removed). The lab report and conclusion will be collect after the 20 minute writing period.

24. Series and Parallel Lab - PreLab

25. Ohm’s Law Post Lab

26. Series and Parallel Lab - PostLab

27. Equivalent Resistance Series Circuit

28. Equivalent Resistance Parallel Circuit

29. Equivalent Resistance Compound Circuit

30. Example #2 A battery charger is connected to a dead battery and delivers a current of 8.0 A for 3.0 hrs, keeping the voltage across the terminals at 12 in the process. G: P=60 W, T= 1 yr, $= $0.08 per kW hr U: Cost per year = _____ E: V = IR, P = W/T S: See Overhead How much energy is delivered to the battery? What is the internal resistance of the battery?

31. Example #3 A circuit is composed of a 24 V battery and four resistors, whose resistances are 110 , 180 , 220 , and 240 . G: V = 24 V U: I series = _____, I PARALLEL = _____ E: V = IR, R series = R 1 + R 2 …, R parallel = 1/ R 1 + 1/ R 2 + … S: See Overhead, S: See Overhead Find the total current supplied by the battery if the resistors are connected in parallel. Find the total current supplied by the battery if the resistors are connected in series.

32. Example #4 Complete the VIRP chart for a 2  and a 6  resistor wired in series with a 12 V battery. VoltageCurrentResistancePower 1 2 Total

33. Example #4 For the 2  and a 6  resistor wired in series with a 12 V battery. Draw the schematic diagram

34. Example #5 Complete the VIRP chart for a 2  and a 6  resistor wired in parallel with a 12 V battery. VoltageCurrentResistancePower 1 2 Total VoltageCurrentResistancePower 1 2 Total

35. Example #5 For the 2  and a 6  resistor wired in series with a 12 V battery. Draw the schematic diagram

36. Example #6 Complete the VIRP chart for for the circuit shown to the right. Let V = 16 V, R 1 = 4 , R 2 = R 3 = 8  VoltageCurrentResistancePower 1 2 Total