1. EET 110 - Survey of Electronics Chapter 14 - Series-parallel circuits

2. Homework Problems - Ch. 12 n Find all unknown values of V, I, R and P

4. Prob. 7

5. 80V

6. Homework problems - Ch. 13 n #1 - Find all unknown V, I, R, and P for:

7. Voltage Current ResistancePower R1 R2 Total R3 8  10  4  40 v

8. n Problem 2 - values of V, I, R, and P I2=4A

9. Voltage Current ResistancePower R1 R2 Total R3 20  50 v 4 A

10. n #3 - Find V, I, R, and P I1=22mA

11. Voltage Current ResistancePower R1 R2 Total 4.7 k  22 mA 3.3 k 

12. n #4 - find V, I, R, and P 10 V

13. Voltage Current Resistance R1 R2 Total 10 V

14. Series-Parallel Circuits n Circuits having components in both Series and Parallel connection have some basic relationships that provide a simple solution.

15. Kirchhoff’s Voltage Law n For a ‘closed loop’, the sum of voltages is zero

16. n For this circuit, – VT = V1 + V2 + V3 n “Around a closed loop, the algebraic sum of all the voltages is zero.”

17. n Kirchhoff’s Current Law n “The current entering any point in a circuit is equal to the current leaving that same point.”

18. Solving Series-Parallel Circuits n Use a combination of Kirchhoff’s laws, and resistor calculations we can solve the circuit

19. n Example 14-2

20. n Example 14-3

21. Example 14-4

22. Assignment n Problems Ch14: 1-4

23. Exam 1 Review n Chapters 1-14 n Electrical Units – Volts, Amps, Watts, Watt-hours n Resistance – Ohms – Resistor Color Code – Series/Parallel equivalent n Ohms Law n Forms

24. Exam 1 Review n Series Circuits – Current is same – Voltage Divider Rule n Parallel Circuits – Voltage is the same – Current Divider Rule

25. Exam 1 Review n Series-Parallel Circuits – Back and forth n Kirchoff’s Laws – Current – at a node current in=current out n Sum = 0 – Voltage – around closed loop, voltage rises = voltage drops n Sum = 0

26. Exam 1 – Review n Schematic symbols/diagrams n Bring – Formula sheet – Calculator – Straight edge – Scratch paper