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ECE2300_Final_Exam_Spring2006

# ECE2300_Final_Exam_Spring2006 - Name(please print Signature...

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Name: _____________________________ (please print) Signature: __________________________ ECE 2300 – Final Exam May 3, 2006 Keep this exam closed until you are told to begin. 1. This exam is closed book, closed notes. You may use one 8.5” x 11” crib sheet, or its equivalent. 2. Show all work on these pages. Show all work necessary to complete the problem. A solution without the appropriate work shown will receive no credit. A solution that is not given in a reasonable order will lose credit. Clearly indicate your answer (for example by enclosing it in a box). 3. It is assumed that your work will begin on the same page as the problem statement. If you choose to begin your work on another page, you must indicate this on the page with the problem statement, with a clear indication of where the work can be found. If your work continues on to another page, indicate clearly where your work can be found. Failure to indicate this clearly will result in a loss of credit. 4. Show all units in solutions, intermediate results, and figures. Units in the exam will be included between square brackets. 5. Do not use red ink. Do not use red pencil. 6. You will have 180 minutes to work on this exam. 1. ________________/10 2. ________________/18 3. ________________/12 4. ________________/24 5. ________________/18 6. ________________/18 Total = 100

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ECE 2300 – Final Exam – May 3, 2006 – Page 2 1. {10 Points} A number (n) of identical devices, consisting of a voltage source E 0 and a resistor R =1[k ], are connected in parallel, and then connected in parallel with the resistor Rp =90[ ], as shown in Figure 1. If an ammeter with a meter resistance R m = 1[ ] is connected in to the circuit at point G, find the number of devices n that must be connected in parallel so that the magnitude of the error of the current measurement is not bigger than 1%. Your solution should be expressed as an inequality.
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