1. Series-Parallel Combination Circuits
October 26, 2017
Series-Parallel Combination Circuits

2. Drill
Compare the brightness of bulb A in circuit 1 with bulb A in circuit 2. Which bulb is brighter?
Bulb A in circuit 1
Bulb B in circuit 2
Neither, they are the same

3. Practice – Calculate these values for the series circuit and parallel circuit on the board
R­eq=_____ P1=______W IT=______A V1=______V P2=______W I1=______A V2=______V P3=______W I2=______A V3=______V P4=______W I3=______A V4=______V PT=______W I4=______A **From here on, let’s round all values to the hundredth place!

4. What if we have a circuit with series and parallel components???
How do we calculate the voltages, currents and equivalent resistance for the circuit?

5. Steps for Series-Parallel Combination
Determine whether circuit has more series characteristics or more parallel characteristics to decide how to simplify circuit.
Simplify circuit into a regular series or regular parallel circuit:
Calculate Req of the resistors you are simplifying.
Replace these resistors with a resistor equal to the Req.
Now resistors should either be all in series or all in parallel.
Calculate Req of the resistors = Req of the entire circuit.
Calculate total current for the circuit using Req and total voltage from the battery.
Calculate voltage and current for the simplified circuit, using the proper rules for that type of circuit.
Return to the original circuit.
Calculate the missing voltage and current values using Ohm’s Law.
Calculate the power values using P=IV.
Check your answer!

6. Series-Parallel Combination Circuits
October 27, 2017
Series-Parallel Combination Circuits

7. Drill - Draw a diagram of the following circuit:
Four resistors, R1, R2, R3 and R4, are connected in a circuit. R1 is in series with the battery and also in series with the combination of R2, R3 and R4 which are all parallel to each other. An ammeter is connected to measure the current across R3. A voltmeter is connected to measure the potential difference across R4.

8. Practice – Calculate values for circuit from Drill
R­eq=_____ P1=______W IT=______A V1=______V P2=______W I1=______A V2=______V P3=______W I2=______A V3=______V P4=______W I3=______A V4=______V PT=______W I4=______A **From here on, let’s round all values to the hundredth place!

9. Practice! Finish classwork from yesterday
New classwork practice worksheet

10. Series-Parallel Combination Circuits
October 30, 2017
Series-Parallel Combination Circuits

11. Drill – Draw diagrams of these circuits
Three resistors, R1, R2 and R3, are connected in a circuit. R2 is parallel to R3. Their combination is series with R1 and a battery. An ammeter is connected to measure the current through R2. A voltmeter is connected to measure the potential difference across R1.
Four resistors, R1, R2, R3, and R4, are connected in a circuit. R1, R2 and R3 are series with each other. Their combination is parallel to R4 and the battery. An ammeter is connected to measure the current through R4 and a voltmeter is connected to measure the potential difference across R1.

12. Extra Credit Opportunity
Dress up on Halloween – 3 points on Thursday’s Test

13. Series-Parallel Combination Circuits
October 31, 2017
Series-Parallel Combination Circuits

14. Drill – Happy Halloween!!
Four resistors, R1, R2, R3 and R4, are connected in a circuit. R1 is parallel to the battery and the series combination of R2, R3 and R4. An ammeter is connected to measure the current through R2. A voltmeter is connected to measure the potential difference across R1.
Three resistors, R1, R2 and R3, are connected in a circuit. R1 is series with R2. Their combination is parallel to R3 and a battery. An ammeter is connected to measure the current through R1. A voltmeter is connected to measure the potential difference across R2.

15. Series-Parallel Combination Circuits
November 1, 2017
Series-Parallel Combination Circuits

16. Drill – Draw a diagram of these circuits:
Four resistors, R1, R2, R3 and R4, are connected in a circuit. R1 is series with R2. R3 is series with to R4. The combination of R1 and R2 is parallel with the battery and parallel with the combination of R3 and R4. An ammeter is connected to measure the current through R1. A voltmeter is connected to measure the voltage across R4.
Three resistors, R1, R2 and R3, are connected in a circuit. R2 is parallel to R3. Their combination is in series with R1 and the battery. An ammeter is connected to measure the current through R2. A voltmeter is connected to measure the voltage across R1. 

17. Test
Thursday:
5 multiple choice (similar to Drill worksheet from last week)
Draw 2 circuits
Solve 1 series-parallel combination circuit
Bonus – extra combination circuit
Friday:
Solve 2 series-parallel combination circuits

18. Review
Four resistors, R1, R2, R3 and R4, are connected in a circuit. R1 and R2 is series with the battery and the parallel combination of R3 and R4. An ammeter is connected to measure the total current in the circuit. A voltmeter is connected to measure the potential difference across R2.
What is held constant in the series portion of a circuit?
What is held constant in the parallel portion of a circuit?

19. IT = _______ A VT = ________V P1 = ________W
Req = _______
IT = _______ A VT = ________V P1 = ________W
I1 = _______ A V1 = ________V P2 = ________W
I2 = _______ A V2 = ________ V P3 = ________W
I3 = _______ A V3 = ________V P4 = ________W
I4 = ________A V4 = ________V P5 = ________W
I5 = ________A V5 = ________V PT = ________W

20. IT = _______ A VT = ________V P1 = ________W
Req = _______
IT = _______ A VT = ________V P1 = ________W
I1 = _______ A V1 = ________V P2 = ________W
I2 = _______ A V2 = ________ V P3 = ________W
I3 = _______ A V3 = ________V P4 = ________W
I4 = ________A V4 = ________V P5 = ________W
I5 = ________A V5 = ________V PT = ________W