1. Week 6 Day 1

2. Units to be measured and calculated VoltageVoltsV or E ResistanceOhmsR or Ω Current AmpsI or A PowerWattW or P

3. Multisim lab test.

4. Work more than 2 weeks past due date may receive zero.

5. Chapter 6 DIVIDER CIRCUITS AND KIRCHHOFF’S LAWS 6.1 Voltage divider circuits............. 171 6.2 Kirchhoff’s Voltage Law (KVL)......... 179 6.3 Current divider circuit............... 190 6.4 Kirchhoff’s Current Law (KCL)......... 193

6. Chapter 7 Series Parallel Combination Circuits 7.1 What is a series-parallel circuit?............. 197 7.2 Analysis technique......................... 200 7.3 Re-drawing complex schematics.............. 208 7.4 Component failure analysis................. 216 7.5 Building series-parallel resistor circuits........ 221 7.6 Contributors.............................. 233

7. (50V – 12.5V) = 37.5Vtotal R1 R2 R3

8. 37.5Vtotal 4Ω +7Ω + 4Ω V/R = I

10. 2.5A x 4Ω = 10V R1 2.5A x 7Ω = 17.5V R2 2.5A x 4Ω = 10V R3 IxR=V

11. Ohm’s Law Kirchhoff’s Voltage Law

13. 5.3 Simple parallel circuits page 139 Experiment 6 Parallel circuits week 6.

14. PARALLEL RESISTORS Two elements or branches are in parallel if they have two points in common.

15. Textbook page 139 The first principle to understand about parallel circuits is that the voltage is equal across all components in the circuit.

17. Textbook page 141 The second principle of parallel circuits: the total circuit current is equal to the sum of the individual branch currents.

18. Chapter 6 page 193 Parallel circuits proportion, or ”divide,” the total circuit current among individual branch currents, the proportions being dependent upon resistances.

19. The current is inverse to the Resistance.

20. We will use Resistance Ω not Conductance G By finding the reciprocal of the resistance of a material, we have a measure of how well the material conducts electricity.

21. Textbook page 141 The total circuit resistance in a parallel circuit is less than any one of the individual resistors.

22. Textbook page 146 For resistors in parallel total resistance is determined from the following equation:

24. Total resistance is less than the smallest resistance. Voltage is the same across all parallel components.

25. 10v / 1000Ω = 10mA I total 60mA This cant go on forever because Power = I x V So W = I [∞] x 10 volts would mean W [∞]

26. Measurements in parallel circuits.

27. Node: A junction point. A terminal common to two or more branches.

28. MEASURING TOTAL CURRENT Lab Test

29. MEASURING CURRENT IDIVIDUAL BRANCH Lab Test

30. MEASURING PARALLEL RESISTANCE

32. R 1 //R 2 R 1 parallel R 2

33. Product / Sum

34. EQUAL PARALLEL RESISTORS R T = R/N 12 Ω /3 = 4 Ω

35. In class Exercise

36. KCL Textbook page 193

37. KCL Kirchhoff’s Current Law (KCL): ”The algebraic sum of all currents entering and exiting a node must equal zero” Textbook page 193

38. Don’t confuse designated points (numbers or letters) with nodes or junctions.

39. Is = I1 + I2 + I3 conventional flow

40. Textbook page 146 8.1mW 40.5mW 81mW = 129.6mW 5.5 Power calculations Power is additive in any configuration of resistive circuit: PTotal = P1 + P2 +... Pn

42. Redrawing a circuit.

44. Printed Circuit Board (PCB)

47. Through Hole

50. SMT Surface Mount Technology

53. Block Diagrams

54. Pictorial Diagrams

55. Schematic Diagrams A schematic diagram is used to illustrate a principle of operation, and therefore does not show parts as they actually appear or function.