1 1 Overview Of Electrical Engineering -Books Pdf

1 1 Overview of Electrical Engineering
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Copyright 2011 2008 2005 by Pearson Education Inc, Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved, Figure 1 1 Pressure versus time for an internal combustion engine experiencing knock Sensors convert pressure to. an electrical signal that is processed to adjust ignition timing for minimum pollution and good performance. Copyright 2011 2008 2005 by Pearson Education Inc, Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley.
All rights reserved,1 2 Circuits Current and Voltages. Copyright 2011 2008 2005 by Pearson Education Inc, Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved, Figure 1 2 The headlight circuit a The actual physical layout of the circuit b The circuit diagram. Copyright 2011 2008 2005 by Pearson Education Inc, Electrical Engineering Principles and Applications Fifth Edition.
Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved, Figure 1 3 An electrical circuit consists of circuit elements such as voltage sources resistances inductances and. capacitances connected in closed paths by conductors. Copyright 2011 2008 2005 by Pearson Education Inc, Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved, Figure 1 4 Current is the time rate of charge flow through a cross section of a conductor or circuit element.
Copyright 2011 2008 2005 by Pearson Education Inc, Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved,Copyright 2011 2008 2005 by Pearson Education Inc. Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved, Figure 1 5 Plots of charge and current versus time for Example 1 1 Note The time scale is in milliseconds ms One.
millisecond is equivalent to 10 3 seconds,Copyright 2011 2008 2005 by Pearson Education Inc. Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved, Figure 1 6 In analyzing circuits we frequently start by assigning current variables i1 i2 i3 and so forth. Copyright 2011 2008 2005 by Pearson Education Inc, Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley.
All rights reserved, Figure 1 7 Examples of dc and ac currents versus time. Copyright 2011 2008 2005 by Pearson Education Inc, Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved,Figure 1 8 Ac currents can have various waveforms. Copyright 2011 2008 2005 by Pearson Education Inc, Electrical Engineering Principles and Applications Fifth Edition.
Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved, Figure 1 9 Reference directions can be indicated by labeling the ends of circuit elements and using double subscripts. on current variables The reference direction for iab points from a to b On the other hand the reference direction for iba. points from b to a,Copyright 2011 2008 2005 by Pearson Education Inc. Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved, Figure 1 10 Energy is transferred when charge flows through an element having a voltage across it.
Copyright 2011 2008 2005 by Pearson Education Inc, Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved, Figure 1 11 If we do not know the voltage values and polarities in a circuit we can start by assigning voltage variables. choosing the reference polarities arbitrarily The boxes represent unspecified circuit elements. Copyright 2011 2008 2005 by Pearson Education Inc, Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley.
All rights reserved, Figure 1 12 The voltage vab has a reference polarity that is positive at point a and negative at point b. Copyright 2011 2008 2005 by Pearson Education Inc, Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved, Figure 1 13 The positive reference for v is at the head of the arrow. Copyright 2011 2008 2005 by Pearson Education Inc, Electrical Engineering Principles and Applications Fifth Edition.
Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved,1 3 Power and Energy,Copyright 2011 2008 2005 by Pearson Education Inc. Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved, Figure 1 14 When current flows through an element and voltage appears across the element energy is transferred. The rate of energy transfer is p vi,Copyright 2011 2008 2005 by Pearson Education Inc.
Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved,Copyright 2011 2008 2005 by Pearson Education Inc. Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved,Figure 1 15 Circuit elements for Example 1 2. Copyright 2011 2008 2005 by Pearson Education Inc, Electrical Engineering Principles and Applications Fifth Edition.
Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved,Copyright 2011 2008 2005 by Pearson Education Inc. Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved,Copyright 2011 2008 2005 by Pearson Education Inc. Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley.
All rights reserved,Figure 1 16 Circuit element for Example 1 3. Copyright 2011 2008 2005 by Pearson Education Inc, Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved,Copyright 2011 2008 2005 by Pearson Education Inc. Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley.
All rights reserved,Figure 1 17 See Exercise 1 6,Copyright 2011 2008 2005 by Pearson Education Inc. Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved,1 4 Kirchhoff s Current Law,Copyright 2011 2008 2005 by Pearson Education Inc. Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved, Figure 1 18 Partial circuits showing one node each to illustrate Kirchhoff s current law.
Copyright 2011 2008 2005 by Pearson Education Inc, Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley. All rights reserved, Figure 1 19 Elements A B C and D can be considered to be connected to a common node because all points in a. circuit that are connected directly by conductors are electrically equivalent to a single point. Copyright 2011 2008 2005 by Pearson Education Inc, Electrical Engineering Principles and Applications Fifth Edition. Upper Saddle River New Jersey 07458,Allan R Hambley.


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