Alternating Current Chapter 31 Notes PDF

PHYSICS (2) FOR SCIENCE AND ENGINEERING FACULTIES Dr. Imad ASAAD First and second Tests The 1st test will be on the 6th week of the semester The 2nd test will be on 12th week Text book: Young and Freedman Sears and Zemansky’s...

PHYSICS (2) FOR SCIENCE AND ENGINEERING FACULTIES Dr. Imad ASAAD First and second Tests The 1st test will be on the 6th week of the semester The 2nd test will be on 12th week Text book: Young and Freedman Sears and Zemansky’s UNIVERSITY PHYSICS; 12th Edition Person International Edition PowerPoint® Lectures for University Physics, Twelfth Edition – Hugh D. Young and Roger A. Freedman Reference: Physics for Scientists and Engineers , ISU International Lectures by JamesStudent Pazun Edition. By Serway Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley 1  Marks Distribution 1st Test 2nd Test Lab Final Exam. 20 Marks 20 Marks 20 Marks 40 Marks 15 marks 5 marks written exam homework Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley 2 Chapter 31 Alternating Current PowerPoint® Lectures for University Physics, Twelfth Edition – Hugh D. Young and Roger A. Freedman Lectures by James Pazun Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley  Goals for Chapter 31 To study voltage, current, and phase angle To consider resistance and reactance To introduce impedance and its application to the L-R-C series circuit To consider power in AC circuits To see resistance in AC circuits To apply AC knowledge to transformers Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley  AC current Notice the new electronic symbol at the top of page 1062. Consider phasor diagrams. Review Figure 31.1. Explain Figure 31.2. (Until now, only Captain Kirk came to mind when someone said “phasor.”) Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley  Resistors in an AC circuit Ohm’s Law applied in oscillatory fashion. Consider Figure 31.7. Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley  Inductors in an AC circuit Replace the resistor in the previous slide with an inductor. Consider Figure 31.8. Follow Example 31.2. Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley  Capacitance in an AC circuit Because this is a series circuit, the current is the same through the capacitor as through the resistor just considered. Consider Figure 31.9 at right. Follow Example 31.3. Figure 31.10 (below) illustrates Example 31.3. Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley  Comparing AC circuit elements Table 31.1 (bottom) provides a valuable summary/comparison for circuit elements. Figure 31.11 (below) shows items as a function of the angular frequency. Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley  The L-R-C circuit Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley  The L-R-C circuit Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley  An L-R-C circuit II Follow Example 31.5 below. Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley  Power in an Consider current, voltage, and power as functions of time. Consider Figure 31.16 below. Follow Examples 31.6 and 31.7. Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley Ex Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley  Circuit behavior at resonance Look at the maximum I when the impedance is a minimum. Refer to Figure 31.18. Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley  The Quality factor Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley  Transformers Consider Figure 31.21 below and Figures 31.22 and 31.23 at right. Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley