Hollistic Supple Men Try Exam Extention Electrical

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B a lliI ' Dar Uniyer sity

~ Institute of Te chn ology

School of Comput ing and Elec trical Engineering

Suppleme ntary Holi st ic Examina tionfor

El e ctrical and Compute r' Engineering pro gr am (Extension)

Date: Aug ust 02, 2011

Time allowed: 3H rs

Do not t urn thi s' page unt il you are t old to d o so

General Instruction

Thi s examination paper contains eight parts. Attempt e ach question

accord ing to the ins truc tions gi ven in each part. Give your ans \ \ 'ers on the

answer sheet provided f or each part.

I Part Result Ir

~I I

I I I I, - - --- -I I VL _ ~ _ . ._ . __. - --. _ . _- - - - ~

I V- -

VI

VI I

VI I I ,



Pad I 112 pts] [recommcnded time 22 min ]

[Introduct ion to comp uting & Obje ct Oricn ted Programmingl

QJ.

Create a class called Com plex f or perf orming arithmetic with com plex numbers.Comp lex numbers have the f orm

realPart + imaginaryPart*i where i = -J -1

Write a program to test your class. Use f loRting-point variables to represent the privatedata of the class. Provide a constructor that enables an ob ject of this class to be initializedwhen it is declared. Provide a no-argument constructor with default values in case noinitializes are provided. Provide public methods that perform the following operations:

[12 pt s J

a. Add t\\ 'O C omplex numbers: The real parts are added together and the imagincryparts are added together.

b. Subtract two Comp lex numbers: The real part of the right operand is subtracted

from the real part of the left operand, and the imaginary part of the right operand issubtracted f rom the imaginary part of the left operand.c. Prin t Complex numbers in the f orm (a, b), where a is the real part and b is the

imaginary part.

Part II 122 pts] [recom mended t ime 40 mini

IEleetriea l Ma terials and Tec hnology & App lied E lect ronics I and [J I

QJ.

Explain the f ollowing terms and describe their importance in characterizing solids. (6Pt5)

i) Band theoryii) Fermi level

Q2.Describe the three BJT configurations and draw their input and output i-v characteristics.

(8P t 5)

Q3,For the circuit :::ho'. \ n below, use superposition to find va in terms of the input voltagesV I and V 2 ' Assume and ideal op amp and (8pt s)

VI = 10 s in(2r r x 6 0t) - 0 .1 s in(2rr x 1000 t) vo Lt sV2 = 10 s in(2rr x 60t) + 0.1 s in(2r r x 100Gt) volt s



P:~ 120 pts] Ir ecomm ended time 36 minI

INetwork Analysis and Synthe sis, Digital Signal Proces sing & Signals & System s

Analy sis I

Q I.

Explain the basic d if f 'erence between:

a. Network analysis and network synthesis.

b. Network driving point f unction and transf er function.

(2 PIS )

(3 PIS)

Q3.

What is the Z-transf orm of the signal 0(1 - n)?

For a Linear Time Invariant continuous time system has a system equation

y "(t) + 2 Y '(t ) + 3y(t ) = 3x(t) Compute (7 pls)

a. H (w) and

b. System transfer f unction

Pllrt IV 114 ptsllrecommcnd ed time 25 mini

lDigital Lo gic De sign and Computer Architecture and Organization]

QI.

Compare and contrast the term 'computer architecture' and 'computer organization'.

Describe the ' \ ,on Neumann model" of a computer system and list out ItS basic

characteristics.

Part V [8 pt sl [recommended tim e 14 mini

lIntr oducti on to Electrical Machin es]



Clearly state the difTcrcncc between \ ,,,ound rotor and squirrel cage induction motor interms of speed control.

Q3.It is not recommended to dri\ 'e dc series motor with belt driven load. Why?

Pal"t VI [9 ptsl/recommende<.l time 15 mini /Intro<.luction to Communication Systems]

For the AM signal expressed 3S Ac[l + Amcos(2rrJ ;nt)]cos(2r r f ct) find the expressionfor modulation ef ficiency.

Part VII 17 pts] /recommen<.led time 13 ri1inl

IElectromagnetic Fields]

Ql.

The point charge Q = 18nC has a velucity ot"Sx 106 m/ s in the direction O.04a~ - O.O Sa y +

0.2a z. Calculate the magnitude of the force exerted on the charge by the f ielda) B = -3a x + 4a)' + 6 a z mTb) E = -3a x + 4a y -+ 6 a z kV / mc) Both Band E acting together

Part VIII 18 rtslll'ecommcndcd time 15 minI

[Introduction to Control Engineeringl

Q2.Write major dif ferences bet\\ "een f requency domain analysis and time domain analysis incontrol system

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Hollistic Supple Men Try Exam Extention Electrical