EPE-121-Assignment Prpblems- Chapter-1.docx

# C at what instant of time is the power being

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c) At what instant of time is the power being extracted from the circuit element the maximum? d) What is the power at the time found in part (c)? e) Calculate the net energy delivered to the circuit at 0,10, 20, 30, 40 and 50 s. 9) The voltage and current at the terminals of the circuit element in Fig.(1) are v = 260 cos 850πt V, i = 9 sin 850πt A. a) Find the maximum value of the power being delivered to the element. b) Find the maximum value of the power being extracted from the element. c) Find the average value of p in the interval 0 ≤ t ≤ 3 ms. d) Find the average value of p in the interval 0 ≤ t ≤ 16.525 ms.

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10) The voltage and current at the terminals of an automobile battery during a charge cycle are shown in Fig.(3). a) Calculate the total charge transferred to the battery, b) Calculate the total energy transferred to the battery, c) Find the total energy delivered to the element. 11) The voltage and current at the terminals of the circuit element in Fig. 1.5 are shown in Fig.(4). a) Sketch the power versus t plot for 0 t 80 b) Calculate the energy delivered to the circuit element at t = 10, 30 and 80 ms. Figure (4) 12) The numerical values of the voltages and currents in the interconnection seen in Fig.(5) are given in the following Table. Does the interconnection satisfy the power check? Figure (5).
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• Spring '16
• Nesma
• Volt, circuit element, Electrical Engineering course, Prof. Sabah Mohamed, E-JUST University

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