2014-15 Sem 1_Final - Brand Type of Calculator Your...

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Brand & Type of Calculator Your University No. w ~ * ~ THE UNIVERSITY OF HONG KONG Bachelor of Engineering Department of Electrical & Electronic Engineering Faculty of Engineering ENGG1203 Introduction to Electrical & Electronic Engineering Examination 19 May 2014 2:30pm-5:30pm • Answer ALL questions. You must submit this question pa- per. • Write your answers on the question paper. • Do NOT use a separate answer book. In each question, space is provided for your answer. Your answer should be concise and to the point. The amount of space provided in each question does NOT neces- sarily reflect the a1nount of inforrnation required in your answer. State clearly any assumptions that you have made. Use of Electronic Calculators: Only approved calculators as announced by the Examinations Sec- retary can be used in this examination. It is candidates respon- sibility to ensure that their calculator operates satisfactorily, and candidates must record the name and type of the calculator used on the front page of the examination script. For official use: Q Marks 1 /30 2 /20 3 /20 4 /20 5 /10 I I /100 \
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ENGG1203 - Final Exam University Number: This pa,ge is intentionally left blank. Use it for scrap 1vork. No \Vork on this page \i;;rill be 111:.:J.rked. EEE/ENGG1203/2014 May Page 2 of 18
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ENGGl203 - Final Exam University Number: Question I Question 1 Short Questions [30 pts] For the following multiple choice questions, you will earn 3 points for each correct answer, and lose 1 point for each answer that is wrong. You will not be deducted any mark if you leave an answer blank. 1. Consider the multiplication of two 2-bit numbers, resulting in a 4-bit number. What is the correct logic expression for c 2 ? a2 a1 x) b, bi C4 C3 Cz C1 A. a1b2 + 02bi B. 02b2 + a1b2 + 02bi C. (02 Ell bz) Ell (01 Ell b1) D. 02a1b2b1 + 0201 b,bi E. 01b2(02 + b1) + (01 + bz)o2b1 D 2. A resistor (R1 to R4) in the following circuit has failed, meaning it is either open or shorted. The following table compares the normal voltages across each load (when all resistors are functioning) versus the measured voltage with the failure. Based on this information, determine which resistor has failed and what type of failure it is. Assume the loads are simple resistors internally with unknown value. A. B. c. D. E. Load 1 Load 2 Load 3 R 1 shorted R2 open R 3 shorted R3 open R4 shorted normal voltage without failure measured voltage with failure 50V 35V 18V 9V 45V ov ov D EEE/ENGG1203/2014 May Page 3 of 18
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ENGG1203 - Final Exam University Number: Question 1
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