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Pertemuan 1
Circuit Analysis andElectrical Engineering
Matakuliah : H0042/Teori Rangkaian Listrik
Tahun : 2005
Versi : <<versi/01
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Learning Outcomes
Pada akhir pertemuan ini, diharapkan mahasiswa
akan mampu :
• Memberikan definisi tegangan dan arus
• Mengidentifikasi hukum-hukum dasar rangkaian listrik
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Outline Materi
• Materi 1 : Telusuran penyelesaian soal
• Materi 2 : Pengertian arus dan tegangan
• Materi 3 : Pengenalan simbol-simbol RL
• Materi 4 : Hukum Ohm
• Materi 5 : Aplikasi Hukum Ohm
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Chapter 1 Circuit Analysis andElectrical Engineering
Engineering Circuit Analysis Sixth Edition
W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin
Copyright © 2002 McGraw-Hill, Inc. All Rights Reserved.
A suggested problem-solving flow chart
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A suggested problem-solving flow chart
W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin, Engineering Circuit Analysis, Sixth Edition.
Copyright ©2002 McGraw-Hill. All rights reserved.
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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.
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 - 2.18 Circuit symbols for various sources
Fig. 2.19 Circuit for Example 2.2
Fig. 2.20 Circuit for Practice Problem 2.20
Fig. 2.23 Ohm’s Law
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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.
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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 i1(t).
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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.
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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.
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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.
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Fig. 2.19Circuit 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 v2 is known to be 3 V, find vL .
If v2 = 3 V
Then it can be consider that :
5v2 = (5 x 3) V = 15 V
vL = 5 v2
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Find the power absorbed by each element in the circuit below.
Circuit for Practice Problem
W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin, Engineering Circuit Analysis, Sixth Edition.
Copyright ©2002 McGraw-Hill. All rights reserved.
W7A = 56 W ; W8V = 16 W ; W-12V = - 60W
W20V = 160 W ; W20VDependent = 0.25 . –12 . 20 = -60 W
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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 = R
v
Ohm’s Law
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RESUME
• Arus ditentukan oleh arah dan variabel arus.
• Tegangan ditentukan oleh polaritas dan variabel tegangan.
• Karakteristik sumber tegangan dan arus ditentukan oleh sifat indepedent dan dependent terhadap beban.
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