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: -------------------------- -------------------------- Page 1/1 Head of Dept.: ------------------------------
