điện tử va máy tính lê chí thông 2014 10 ece midterm (1) sinhvienzone com

Le Chi Thong INSTRUCTIONS:  Answer on this question sheet..  Lectures, class notes, books, laptops, iPads, … are NOT accepted..  Arithmetic-only calculators are accepted..  Show al

I NTRO TO E LECTRICAL AND C OMPUTER E NGINEERING (ECE110)

M IDTERM E XAMINATION

Semester 1 (2014-2015)

Duration: 60 min

Department of Electronics Engineering Lecturer

Dr Le Chi Thong

INSTRUCTIONS:

 Answer on this question sheet

 Lectures, class notes, books, laptops, iPads, … are NOT accepted

 Arithmetic-only calculators are accepted

 Show all your work, e.g., your solution process, the equation(s) that you use, the values of the

variables used the equation(s), …

 Include the unit of measurement in each answer

 Do NOT communicate with any other students

Problem 1

a) Compute the variation of charge from 0 to 12 sec for the following current:

Student ID Number

I [mA]

t [sec]

8 10 12

6

2

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b) Compute the period, and of the following signal: (1.5 points)

Problem 2

Find the resistance between A and B and the resistance between C and D (1.5 points)

V [V]

t [sec]

4 6 8

15

5

10

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Problem 3: Use the following circuit for this problem

a) Find the value of V 1 , V 2 , V 4 , i 1 , i 2 and i 3 (1.5 points)

b) Compute the power of all elements in this circuit and specify the elements are source or load (1.0

point)

14V element

2 Ω element

6V element

1Ω element

3A element Power

Source/Load

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Problem 4

Given

Given

c) Find the values of I2 and V2 when circuit in a) and circuit in b) are connected together (1.0 point)

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