Electrical Engineering Electric Circuits Theory Basic Laws Circuit Theorems

Electrical Engineering Electric Circuits Theory Basic Laws Circuit Theorems

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Electrical Engineering – Electric Circuits Theory
Michael E.Auer     24.10.2012             EE01
• Basic Laws
• Circuit Theorems
• Methods of Network Analysis
• Non-Linear Devices and Simulation Models
EE Modul 1: Electric Circuits Theory
Page 2

Electrical Engineering – Electric Circuits Theory
Michael E.Auer     24.10.2012             EE01
• Basic Laws
• Circuit Theorems
• Methods of Network Analysis
• Non-Linear Devices and Simulation Models
EE Modul 1: Electric Circuits Theory
Electrical Engineering – Electric Circuits Theory
Michael E.Auer     24.10.2012             EE01
• Current, Voltage, Impedance
• Ohm’s Law, Kirchhoff's Law
• Circuit Theorems
• Methods of Network Analysis

EE Modul 1: Electric Circuits Theory
Page 3

Electrical Engineering – Electric Circuits Theory
Michael E.Auer     24.10.2012             EE01
• Basic Laws
• Circuit Theorems
• Methods of Network Analysis
• Non-Linear Devices and Simulation Models
EE Modul 1: Electric Circuits Theory
Electrical Engineering – Electric Circuits Theory
Michael E.Auer     24.10.2012             EE01
• Current, Voltage, Impedance
• Ohm’s Law, Kirchhoff's Law
• Circuit Theorems
• Methods of Network Analysis

EE Modul 1: Electric Circuits Theory
Electrical Engineering – Electric Circuits Theory
Michael E.Auer     24.10.2012             EE01
Electric Charges

• Charge is an electrical property of the atomic particles of
which matter consists, measured in coulombs (C).

• The charge e on one electron is negative and equal in
magnitude to 1.602 × 10
-19
C which is called as
electronic charge. The charges that occur in nature are
integral multiples of the electronic charge.
Page 4

Electrical Engineering – Electric Circuits Theory
Michael E.Auer     24.10.2012             EE01
• Basic Laws
• Circuit Theorems
• Methods of Network Analysis
• Non-Linear Devices and Simulation Models
EE Modul 1: Electric Circuits Theory
Electrical Engineering – Electric Circuits Theory
Michael E.Auer     24.10.2012             EE01
• Current, Voltage, Impedance
• Ohm’s Law, Kirchhoff's Law
• Circuit Theorems
• Methods of Network Analysis

EE Modul 1: Electric Circuits Theory
Electrical Engineering – Electric Circuits Theory
Michael E.Auer     24.10.2012             EE01
Electric Charges

• Charge is an electrical property of the atomic particles of
which matter consists, measured in coulombs (C).

• The charge e on one electron is negative and equal in
magnitude to 1.602 × 10
-19
C which is called as
electronic charge. The charges that occur in nature are
integral multiples of the electronic charge.
Electrical Engineering – Electric Circuits Theory
Michael E.Auer     24.10.2012             EE01
Electric Current (1)

• Electric current i = dq/dt. The unit of ampere can
be derived as 1 A = 1C/s.
• A direct current (dc) is a current that remains
constant with time.
• An alternating current (ac) is a current that
varies sinusoidally with time.
Page 5

Electrical Engineering – Electric Circuits Theory
Michael E.Auer     24.10.2012             EE01
• Basic Laws
• Circuit Theorems
• Methods of Network Analysis
• Non-Linear Devices and Simulation Models
EE Modul 1: Electric Circuits Theory
Electrical Engineering – Electric Circuits Theory
Michael E.Auer     24.10.2012             EE01
• Current, Voltage, Impedance
• Ohm’s Law, Kirchhoff's Law
• Circuit Theorems
• Methods of Network Analysis

EE Modul 1: Electric Circuits Theory
Electrical Engineering – Electric Circuits Theory
Michael E.Auer     24.10.2012             EE01
Electric Charges

• Charge is an electrical property of the atomic particles of
which matter consists, measured in coulombs (C).

• The charge e on one electron is negative and equal in
magnitude to 1.602 × 10
-19
C which is called as
electronic charge. The charges that occur in nature are
integral multiples of the electronic charge.
Electrical Engineering – Electric Circuits Theory
Michael E.Auer     24.10.2012             EE01
Electric Current (1)

• Electric current i = dq/dt. The unit of ampere can
be derived as 1 A = 1C/s.
• A direct current (dc) is a current that remains
constant with time.
• An alternating current (ac) is a current that
varies sinusoidally with time.
Electrical Engineering – Electric Circuits Theory
Michael E.Auer     24.10.2012             EE01
Electric Current (2)
The direction of current flow:
Positive ions Negative ions
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FAQs on Electrical Engineering Electric Circuits Theory Basic Laws Circuit Theorems

 1. What are the basic laws in electrical engineering?
Ans. The basic laws in electrical engineering include Ohm's Law, Kirchhoff's Voltage Law (KVL), and Kirchhoff's Current Law (KCL). These laws are fundamental principles that govern the behavior of electric circuits.
 2. How do I apply Ohm's Law in electric circuits?
Ans. Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage applied across it and inversely proportional to its resistance. To apply Ohm's Law, you can use the equation: V = I * R, where V is the voltage, I is the current, and R is the resistance.
 3. What is Kirchhoff's Voltage Law (KVL)?
Ans. Kirchhoff's Voltage Law (KVL) states that the sum of the voltages around any closed loop in a circuit is equal to zero. This law is based on the principle of conservation of energy and is used to analyze and solve complex circuits by writing and solving simultaneous equations.
 4. How can I use Kirchhoff's Current Law (KCL) in circuit analysis?
Ans. Kirchhoff's Current Law (KCL) states that the sum of currents entering a node or junction in a circuit is equal to the sum of currents leaving that node or junction. KCL is commonly used to determine unknown currents or to verify the accuracy of current measurements in a circuit.
 5. What are some commonly used circuit theorems in electrical engineering?
Ans. Some commonly used circuit theorems in electrical engineering include the Superposition Theorem, Thevenin's Theorem, Norton's Theorem, and Maximum Power Transfer Theorem. These theorems provide valuable tools for simplifying complex circuits and analyzing their behavior.