Academic year :
Term
:
Course Name :
Course Code :
Department :
2020/2021
Sept./ Dec. 2020
Principles of Electrical Engineering
EEC 101
Electrical Engineering
Electronics & Communication Eng.
Higher Technological
Institute
10th of Ramadan City
Final Term Exam
: Groups 1 to 30
Time
:
90 min.
Date
:
8 / 3 / 2021
No. of pages
:
1
Examinars : Prof .Dr./ Ebtisam Saied
Ass. Prof. Dr./ Mohamed Enany
Solve 4 Questions ONLY;
Question No. (1): Obtain the equivalent resistance Rab of the circuit shown in figure (1)
[Aa,Bm] [10 Marks]
Question No. (2): Use the principle of superposition to find io the circuit shown in figure (2) [Ba,Ca] [10 Marks]
Question No. (3): Find the steady state expression for v(t) in the circuit shown in figure (3) [Aa,Bm] [10 Marks]
Question No. (4): For the circuit shown in figure (4),
[Aa,Ck] [10 Marks]
(a) Determine the impedance ZL that results in maximum average power transferred to ZL.
[6 Marks]
(b) What is the maximum average power transferred to ZL determined in (a), and load power factor?
[4 Marks]
Question No. (5): For the circuit shown in figure (5),
(a) Find Z1 if Is = 25 / 30 o A for an applied voltage Vs = 50 / 60 o V.
(b) Obtain the average power, reactive power, apparent power for the source.
[Bm,Ck] [10 Marks]
[5 Marks]
[5 Marks]
[Total marks is 40]
GOOD LUCK
Signature of:
Examinars: --------------------------
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Head of Dept.: ------------------------------
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