figure 3.1 decision-making tree: transferring to a higher level of care

Copyright ©2011, ©2008, ©2005 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458

All rights reserved.

Electric Circuits, Ninth EditionJames W. Nilsson • Susan A. Riedel

Figure 3.1 Decision-making tree: transferring to a higher level of care.




Figure 3.2 Series resistors with a single unknown current is.




Figure 3.3 A simplified version of the circuit shown in Fig. 3.2.




Figure 3.4 The black box equivalent of the circuit shown in Fig. 3.2.




Figure 3.5 Resistors in parallel.




Figure 3.6 Nonparallel resistors.




Figure 3.7 Replacing the four parallel resistors shown in Fig. 3.5 with a single equivalent resistor.




Figure 3.8 Two resistors connected in parallel.




Figure 3.9 The circuit for Example 3.1.




Figure 3.10 A simplification of the circuit shown in Fig. 3.9.




Figure 3.11 The circuit of Fig. 3.10(b) showing the numerical value of is .




Figure 3.12 (a) A voltage-divider circuit and (b) the voltage-divider circuit with current i indicated.




Figure 3.13 A voltage divider connected to a load RL.




Figure 3.15 The current-divider circuit.




Figure 3.17 A simplification of the circuit shown in Fig. 3.16.




Figure 3.18 Circuit used to illustrate voltage division.




Figure 3.19 Circuit used to illustrate current division.




Figure 3.21 An ammeter connected to measure the current in R1 and a voltmeter connected to measure the voltage across R2.




Figure 3.22 A short-circuit model for the ideal ammeter, and an open-circuit model for the ideal voltmeter.




Figure 3.23 A schematic diagram of a d’Arsonval meter movement.




Figure 3.24 A dc ammeter circuit.




Figure 3.25 A dc voltmeter circuit.




Figure 3.26 The Wheatstone bridge circuit.




Figure 3.27 A balanced Wheatstone bridge (ig = 0).




Figure 3.28 A resistive network generated by a Wheatstone bridge circuit.




Figure 3.29 A ∆ configuration viewed as a π configuration.




Figure 3.30 A Y structure viewed as a T structure.




Figure 3.31 The ∆-to-Y transformation.




Figure 3.33 The equivalent Y resistors.




Figure 3.34 A transformed version of the circuit shown in Fig. 3.32.




Figure 3.35 The final step in the simplification of the circuit shown in Fig. 3.32.




Figure 3.36 Model of a defroster grid.




Figure 3.37 A simplified model of the defroster grid.




Figure P3.1




Figure P3.2




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Figure P3.21




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Figure P3.67

figure 3.1 decision-making tree: transferring to a higher level of care

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