1 / 21

Chapter 2

Chapter 2. Resistive Circuits. Concept Test. For resistors in series , what is the same for every resistor? R, V or I? Answer: I For resistors in parallel, what is the same for every resistor? R, V or I? Answer: V. Resistors in Series. Resistors in Parallel. Voltage-divider rule

aileen-chase
Télécharger la présentation

Chapter 2

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 2 Resistive Circuits

  2. Concept Test • For resistors in series, what is the same for every resistor? R, V or I? • Answer: I • For resistors in parallel, what is the same for every resistor? R, V or I? • Answer: V

  3. Resistors in Series Resistors in Parallel

  4. Voltage-divider rule • “The voltage across any resistor in a series is some fraction of the battery voltage.”

  5. In-Class Team Exercise • Wheatstone Bridge • Series and Parallel Circuits

  6. In-Class Problems • P2.1(b) • P2.3 • P2.7 • P2.13 • P2.18 • P2.21 • P2.29 • P2.25

  7. Series DC Networks • Two elements are in series if they have only one terminal in common that is not connected to a third current carrying component. • Total Resistance Current through a Series

  8. Consider Figure 2.29. • E=24V, R1=2W, R2=4W, R3=6W • What is RT? • What is I? • What is V1, V2 and V3? • What is P1, P2, P3, and PE?

  9. Express these numbers with only three significant figures and in the most convenient form. • 0.038457 C • 0.0012878 A • 12869.578 V • 0.57382 W

  10. 2.7 Parallel DC Networks • Two elements are in parallel if they have two terminals in common. • Total Resistance Source Current

  11. Example Problem 2.28 • Using Kirchhoff’s current law, determine the currents I3 and I6 for the system of Figure 2.38

  12. Consider Figure 2.32. • E1=100V • E2=50V • E3=20V • R1=10W • R2=30W • R3=40W • What is I? • What is V2?

  13. Example Problem 2.25 • Find V1 and V2 of Figure 2.33 using Kirchhoff’s voltage law.

  14. Current-divider rule • “The current through any resistor in parallel with other resistors is some fraction of the source current.”

  15. Example Problem 2.26 • Determine the following for the parallel network in Fig. 2.36. • (a) RT • (b) I • (c) I2 • (d) P3

  16. 2.8 Series-Parallel Networks Example Problem 2.29 • Determine the following for the network in Fig. 2.41. • (a) RT • (b) I • (c) I1 and I2 • (d) V1

  17. Voltage (page 13) • The term ground refers to a zero voltage or earth potential. • Ground Circuit Symbols

  18. How Batteries Work • Battery Parts: Two different metals separated by an electrolyte • History: The first battery was created by Alessandro Volta in 1800. • He used zinc, silver and salt water to make a voltaic pile.

  19. Appendix B: Resistor Color Codes -2 Silver -1 Gold 0 Black 1 Brown 2 Red 3 Orange 4 Yellow 5 Green 6 Blue 7 Violet 8 Gray 9 White Tolerance 5% Gold 10% Silver 20% No 4th band Memorize this table.

  20. Announcements • Lab Starts Today • Teams will sit together in lab

  21. Potentiometers • They are three terminal devices with a knob. • The knob moves a slider which changes the resistance between the terminals. • Circuit Symbols:

More Related