Circuits 1
Methods of solution of DC
circuits (Cont.)
Network Theorems
Prof. Dr.
Mohamed Fathy
Copyright 2009
Prof. Dr. Mohamed Fathy Abu El-Yazeed
1
Network Theorems
These theorems are very useful in their
applications and can reduce much work in circui
Circuits 1
Methods of solution of DC circuits (Cont.)
Method 4: Nodal Analysis
Prof. Dr.
Mohamed Fathy
1
Copyright 2009
Prof. Dr. Mohamed Fathy Abu El-Yazeed
Method 4 Nodal Analysis
Steps of solution:
1- Convert independent voltage sources into
equivalen
Circuits 1
Methods of solution of DC circuits
(Cont.)
Method 3: Loop Analysis
Prof. Dr.
Mohamed Fathy
1
Copyright 2009
Prof. Dr. Mohamed Fathy Abu El-Yazeed
Methods of solution of DC circuits
Method 3 Loop Current Method (Mesh Analysis)
1- Convert indepe
Cairo University
Faculty of Engineering
Comm. & Computer Eng. Dept.
Circuits 1
Lecture #1
Prof. Dr.
Mohamed Fathy
Copyright 2009
Prof. Dr. Mohamed Fathy Abu El-Yazeed
1
Course Importance
1- The most important course for an electrical
engineering student
2
Cairo University
Faculty of Engineering
Electronics & Comm. Eng. Dept.
Circuits 1
1st year
Prof. Dr. Mohamed Fathy
SHEET 3
CIRCUIT THEOREMS
Note: Unless otherwise stated, all resistors are in k , all batteries
voltages are in volts and all current sources
Circuits 1
Methods of solution of DC circuits
Prof. Dr.
Mohamed Fathy
1
Copyright 2009
Prof. Dr. Mohamed Fathy Abu El-Yazeed
Methods of solution of DC
circuits
Definition :
The problem of solution of DC circuits is
finding the response (voltage or curren
Cairo University
Faculty of Engineering
Electronics & Comm. Eng. Dept.
Circuits 1
1st year
Prof. Dr. Mohamed Fathy
SHEET 2
SOLUTION METHODS OF DC CIRCUITS
Note: Unless otherwise stated, all resistors are in k , all batteries voltages
are in volts and all
Cairo University
Faculty of Engineering
Electronics & Comm. Eng. Dept.
Circuits 1
1st year
Prof. Dr. Mohamed Fathy
Sheet 1
10K
5K
10K
1- Find the currents in all branches
of the shown circuit. Check the
power balance.
10K
20V
5K
Answer: ( Power dissipated