Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley PowerPoint ® Lectures for University Physics, Twelfth Edition – Hugh D. Young and Roger A. Freedman Lectures by James Pazun Chapter 30 Inductance

Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley Goals for Chapter 30 To introduce and illustrate mutual inductance To consider self-inductance To calculate magnetic-field energy To describe and study R-L circuits To describe and study L-C circuits To describe and study L-R-C circuits

Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley Introduction A charged coil can create a field that will induce a current in a neighboring coil. Inductance can allow a sensor to trigger the traffic light to change when the car arrives at an intersection. This device is my favorite … I know when I’m sitting through an old light, it cycles for 2 minutes before I can go.

Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley Mutual inductance A coil in one device generates a field that creates a current in a neighboring coil. You could use this principle to create a charger that restores a battery without an actual connection, just proximity.

Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley Mutual inductance—examples Refer to Example See Figure 30.3 below. Follow Example 30.2.

Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley Self-inductance

Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley Applications and calculations Consider Figures 30.6 at right. Follow Example 30.3 illustrated by Figure 30.8 below. Follow Example 30.4.

Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley Magnetic field energy Consider Figure 30.10, below center. Refer to Example Refer to Example 30.6.

Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley The R-L circuit Read Problem-Solving Strategy Consider Figure 30.11, in the lower-left quadrant of the page. Consider Figure

Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley R-L circuit II Follow Example Consider Figure at right. Follow Example 30.8.

Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley The L-C circuit Consider Figure

Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley Applications and comparisons Consider Figure Use Table Follow Example Follow Example

Copyright © 2008 Pearson Education Inc., publishing as Pearson Addison-Wesley The L-R-C circuit An application of the damped oscillator. Consider Figure Consider Figure Follow Example