1. Electrical Engineering for Civil Engineer Dr. Basim Zafar Spring 2013 EE for CE Course Outlines MID TERM I Dr. Basim Zafar

2. Electrical Engineering for Civil Engineer Dr. Basim Zafar Spring 2013Slide 2 EE for CE - MID TERM I 1.Frequency. 2.Resistance, Capacitor & Inductors in Parallel & Series. 3.Ohm’s Law. 4.Two special resistor values (Open & Short Circuit). 5.Electric Power Calculator 6.Kirchhoff’s Current & Voltage Law 7.Voltage & Current Divider 8.Circuit Analysis using KVL & KCL. 9.Linearity and Superposition 10.Thévenin’s Theorem 11.Source Transformations

3. Electrical Engineering for Civil Engineer Dr. Basim Zafar Spring 2013Slide 3 1. Frequency Frequency = Number of cycles per second volt time Unit : Hertz a.Calculate the frequency of a signal b.Draw a signal with a certain frequency.

4. Electrical Engineering for Civil Engineer Dr. Basim Zafar Spring 2013Slide 4 2. Resistance, Capacitor & Inductors in Parallel & Series. Calculate Resistance, Capacitor & Inductors in Parallel & Series combinations. Capacitors: Passive electronic component consisting of a pair of conductors separated by a dielectric (insulator). Measured in Farad (F) – Uses : to block DC, to filter noise, to smooth power supplies, to tune radio channels & in memories. Inductors: Passive electrical component that can store energy in a magnetic field created by the electric current passing through it. Measured in Henry (H) Uses: Resists (reacts) AC current with delay – no effect when DC is used

5. Electrical Engineering for Civil Engineer Dr. Basim Zafar Spring 2013Slide 5 3. Ohm’s Law.

6. Electrical Engineering for Civil Engineer Dr. Basim Zafar Spring 2013Slide 6 4. Two special resistor values (Open & Short Circuit).

7. Electrical Engineering for Civil Engineer Dr. Basim Zafar Spring 2013Slide 7 5. Electric Power Calculator

8. Electrical Engineering for Civil Engineer Dr. Basim Zafar Spring 2013Slide 8 6. Kirchhoff’s Current & Voltage Law Kirchhoff’s Current Law : “The sum of the current entering a node equal to the sum of the currents leaving.” Kirchhoff’s Voltage Law : “Sum of the voltage drops around a circuit equal zero.”

9. Electrical Engineering for Civil Engineer Dr. Basim Zafar Spring 2013Slide 9 7. Voltage & Current Divider

10. Electrical Engineering for Civil Engineer Dr. Basim Zafar Spring 2013Slide 10 8. Circuit Analysis using KVL & KCL. To solve for all currents in more than one source circuit: 1.Count nodes minus one (possible ground) 2.Mark a current for each branch (name and direction) 3.Write KCL equations for each node 4.Count the loops 5.Write the KVL equations for each loop 6.Solve for all unknowns

11. Electrical Engineering for Civil Engineer Dr. Basim Zafar Spring 2013Slide 11 9. Linearity and Superposition Linearity procedure: 1. Give to Vo any arbitrary value (e.g., V’ out =1 ) 2. Compute the resulting source value and call it V’_s 3. Use linearity. Circuit with current source set to zero(OPEN) Circuit with voltage source set to zero (SHORT CIRCUITED) SOURCE SUPERPOSITION = + Due to the linearity of the models we must have Principle of Source Superposition

12. Electrical Engineering for Civil Engineer Dr. Basim Zafar Spring 2013Slide 12 10. Thévenin’s Theorem Th é venin Equivalent Circuit V Th R Th Resistive Circuit

13. Electrical Engineering for Civil Engineer Dr. Basim Zafar Spring 2013Slide 13 11. Source Transformations