2. Chapter 2 Basic Components and Electric Circuits Engineering Circuit Analysis Sixth Edition W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin Copyright © 2002 McGraw-Hill, Inc. All Rights Reserved. User Note: Run View Show under the Slide Show menu to enable slide selection. Fig. 2.1 “Charge flowing through a wire…” Figs. 2.5 and 2.6 Current labeling conventions Figs. 2.9 and 2.10 Voltage labeling conventions Fig. 2.12“The power absorbed by the element is…” Figs. 2.16 - 2.18Circuit symbols for various sources Fig. 2.19Circuit for Example 2.2 Fig. 2.20Circuit for Practice Problem 2.20 Fig. 2.23Ohm’s Law

3. Fig. 2.1 “Charge flowing through a wire…” W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin, Engineering Circuit Analysis, Sixth Edition. Copyright ©2002 McGraw-Hill. All rights reserved.

4. Figs. 2.5 and 2.6 Current labeling conventions W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin, Engineering Circuit Analysis, Sixth Edition. Copyright ©2002 McGraw-Hill. All rights reserved. Two different methods of labeling the same current. (a,b) Incomplete, improper, and incorrect definitions of a current. (c) the correct definition of i 1 (t).

5. Voltage

6. Figs. 2.9 and 2.10 Voltage labeling conventions W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin, Engineering Circuit Analysis, Sixth Edition. Copyright ©2002 McGraw-Hill. All rights reserved. (a, b) These are inadequate definitions of a voltage. (c) A correct definition includes both a symbol for the variable and a plus- minus symbol pair. (a, b) Terminal B is 5 V positive with respect to terminal A; (c,d) terminal A is 5 V positive with respect to terminal B.

7. Fig. 2.12 “The power absorbed by the element is…” W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin, Engineering Circuit Analysis, Sixth Edition. Copyright ©2002 McGraw-Hill. All rights reserved. If the current arrow is directed into the “ +” marked terminal of an element, then p = vi yields the absorbed power. A negative value indicates that power is actually being generated by the element. If the current arrow is directed out of the “ +” terminal of an element, then p = vi yields the supplied power. A negative value in this case indicates that power is actually being absorbed instead of generated.

8. Figs. 2.16 - 2.18 Circuit symbols for various sources W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin, Engineering Circuit Analysis, Sixth Edition. Copyright ©2002 McGraw-Hill. All rights reserved. Symbol for: (a) DC voltage source; (b) battery; (c) ac voltage source. Symbol for an independent current source. The four different types of dependent sources: (a) current-controlled current source; (b) voltage-controlled current source; (c) voltage-controlled voltage source; (d) current-controlled voltage source.

9. Fig. 2.19 Circuit for Example 2.2 W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin, Engineering Circuit Analysis, Sixth Edition. Copyright ©2002 McGraw-Hill. All rights reserved. In the circuit below,if v 2 is known to be 3 V, find v L.

10. Find the power absorbed by each element in the circuit below. Fig. 2.20 Circuit for Practice Problem 2.20 W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin, Engineering Circuit Analysis, Sixth Edition. Copyright ©2002 McGraw-Hill. All rights reserved.

11. Fig. 2.23 Ohm’s Law W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin, Engineering Circuit Analysis, Sixth Edition. Copyright ©2002 McGraw-Hill. All rights reserved. v = i R or i = Ohm’s Law