Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 224 views

    Bda 14303

    Uploaded by

    Mahfuzah Mustapha
    The document appears to be an exam for a course on electrical and electronic technology. It contains questions on topics like direct current versus alternating current, circuit analysis, capacitors, inductors, motors, and diodes. Diagrams and equations are provided. The exam is confidential and for a bachelor's degree program at a Malaysian university. It consists of two required sections and three optional questions to choose from.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PDF, TXT or read online from Scribd

    Bda 14303

    Uploaded by

    Mahfuzah Mustapha
    224 views8 pages
    The document appears to be an exam for a course on electrical and electronic technology. It contains questions on topics like direct current versus alternating current, circuit analysis, capacitors, inductors, motors, and diodes. Diagrams and equations are provided. The exam is confidential and for a bachelor's degree program at a Malaysian university. It consists of two required sections and three optional questions to choose from.

    Original Title

    BDA+14303

    Copyright

    © Attribution Non-Commercial (BY-NC)

    Available Formats

    PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    The document appears to be an exam for a course on electrical and electronic technology. It contains questions on topics like direct current versus alternating current, circuit analysis, capacitors, inductors, motors, and diodes. Diagrams and equations are provided. The exam is confidential and for a bachelor's degree program at a Malaysian university. It consists of two required sections and three optional questions to choose from.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    224 views8 pages

    Bda 14303

    Uploaded by

    Mahfuzah Mustapha
    The document appears to be an exam for a course on electrical and electronic technology. It contains questions on topics like direct current versus alternating current, circuit analysis, capacitors, inductors, motors, and diodes. Diagrams and equations are provided. The exam is confidential and for a bachelor's degree program at a Malaysian university. It consists of two required sections and three optional questions to choose from.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    You are on page 1of 8

    CONFIDENTIAL

    '*
    a

    ff% lt

    s.

    4,

    +,,:p( os
    '.{J:i$t3r'

    /$

    lx "-

    UNIVERSITI TUN HUSSEIN ONN MALAYSIA

    FINAL BXAMINATION
    SBMESTER II SESSTON 2012 /2013

    COURSE NAME

    ELECTRICAL AND ELECTRONIC TECHNOLOGY


    BDA14303 / 8EX17003 lBEEI803

    COURSE CODE

    PROGRAMME

    BDD
    JUNE 2013
    3 HOURS

    EXAMINATION DATE
    DURATION
    INSTRUCTIONS

    l. sEcTroN A coNSrsT oF rwo?)


    QUESTIONS. ANSWER ALL QUESTIONS. 2. SECTTON B CONSTSTS OF FrVE(s) QUESTTONS. ANSWER ANY THREE(S) QUESTIONS.

    THIS QUESTION PAPER CONSISTS OF EIGHT (8) PAGES

    CONFIDENTIAL

    BDA 14303/BEX 17003/BEE 1803

    PART A (ANSIryER ALL QAESTIONS)

    Ql (a)

    State the difference between direct current and alternating current suitable figures.

    with the aid of


    (4 marks)

    (b) In an electrochemistry cell consists of two electrodes immersing in an ionic solution


    and the two electrodes (cathodes and anodes) are connected to the positive and negative terminals of a battery. The cunent flowing through the electrodes is
    a i(r): )240<t<2 5"-", t> z L

    (i) (ii) (c)

    Determine the charge entering the cell from t

    0s to t

    3s

    (6

    marks)

    If the energy to move the charge from one electrode to another electrode is 30J, find the voltage drop across the two electrodes. (2 marks)

    Refening to Figure Ql(c), calculate the power absorbed by each resistors.


    (g marks)

    Q2 (a)
    (b)

    Referring to Figure Q2(a), how many branches and nodes does the circuit have? (2 marks)

    Define Kirchoff s Voltage Law (KVL).


    (2 marks) For the circuit in Figure Q2(c), determine:

    (c)

    (i) (ii) (iii) (iv) (v)


    (d)

    Equivalent resistance (2 marks)

    Totalcunent
    (2 marks) Currents through each resistor (2 marks) Power for each element (2 marks) Power supply by the source
    (2 marks)

    Apply mesh analysis to find Vo in the circuit of Figure Q2(c).


    (6 marks)

    BDA I 4303/BEX I 7003/BEE I 803

    PART B (ANS\yER ANY THREE (3) QUESTTONS)

    Q3 (a)

    Capacitor is one of the energy storage elements in electrical circuit. Explain with aid of suitable figures and/or equation for the following questions:

    the

    (i) (ii)

    Construction of capacitor.
    (2 marks)

    Calculate the amount of charge stored 9V voltaee source.

    if

    a 0.01pF capacitor is supplied with a (3 marks)

    (iii)

    Determine the current through a 200pF capacitor whose voltage is shown in Figure Q3(aXiii) below and draw the resultant current. Given that,

    0<t<1 100-50tv I <t<3 -200+50tv 3<t<4


    50t

    0 (b)

    otherwise (9 marks)

    Determine the equivalent inductors for the circuit in Figure Q3(b) and then find the total voltage from / : I s to t: 2s. Given that the current is i(t) : (2 - ze-\A. (6 marks)

    Q4 (a)

    Explain the following terms.

    (i) (ii) (iii)


    (b)

    Magnetomotive force (MMF)


    (2 marks)

    Magnetic flux
    (2 marks) Reluctance
    (2 marks)

    Draw with a diagram to explain how a magnetic field is generated when a current
    passes through a conductor.

    (2 marks)

    (c)

    An iron ring of mean diameter 15 cm and l0 cm2 in cross-section is wound with 200 turns of wire. There is an air gap of 2 mm cut in the ring. For a flux density of lWb/m2 and a relative permeability of 500;

    (i)
    i)

    Draw the schematic diagram of this ring and the configuration.


    (2 marks)

    (i

    Determine the exciting current, inductance and the stored energy. (10 marks)

    BDA l 4303/BEX I 7003/BEE I 803

    Q5 (a)

    Explain the importance of power factor in power delivery.


    (2 marks)

    (b)

    A current source of i(t):1.789 cos (4t+26.57o) A is applied to a single element load. The resulting voltage across the element is v(t) :4.47 cos (4t-63.43o) v.

    (i) (ii) (c)

    What type of element is this? Calculate its value.


    (6 marks)

    Which signal leads and by how much?


    (2 marks)

    A sinusoidal voltage is applied to the AC circuit in Figure Q5(c).

    (i) (ii)

    Find the output power of the voltage source. (8 marks) Find the power dissipation in resistor, Rr and Rz. (2 marks)

    Q6 (a)

    Define the term of AC Motor?


    (2 marks)

    (b) (c) (d)

    Give ONE (1) advantage of AC motor compare to DC motor?


    (2 marks)

    List ONE (1) way to increase the turning force (or torque) that the DC motor can
    create.

    (2 marks) Define the following DC motor term as below:

    (D (ii) (iii) (e)

    Armature
    (2 marks)

    Commutator (2 marks)
    Brushes

    (2 marks)

    Give TWO (2) examples DC motor for

    (i) (ii)

    residential and commercial (2 marks) industrial (2 marks)

    BDA r 4303/BEX I 7003/BEE I 803

    (0

    A three-phase 300V, 60 Hz, six pole, induction motor delivers lOkW at a slip of
    Calculate:

    3%u

    (i) (ii)

    synchronous speed (2 marks)

    rotor speed
    (2 marks)

    Q7 (a)

    Use diagram to show electron flow of a diode when

    it is forward biased.
    (3 marks)

    (b)

    Draw a I-V characteristic curve of the diode and explain the operation of the diode. (4 marks)

    (c) A 5V D C supply is required to power a microcontroller in a device. Sketch the


    schematic diagram of the DC power supply circuit and the clean output waveforms. Explain the function of each component sketched. (8 marks)

    (d)

    Explain why analog-to-digital converter


    applications.

    is

    needed

    in

    many electronic circuit


    (5 marks)

    -END OF QUESTTON-

    BDA r4303/BEX r 7003/BEE r803

    FINAL EXAMINATION
    SEMESTER/SESION iil/2012/2013

    PROGRAME: BDD
    COURSE CODE : BDAI4303 / BEX 17003/BEEr803

    COURSENAME

    ELECTRICAL & ELECTRONIC TECHNOLOGY

    9Vi

    FIGURE Ol(c)

    FIGURE O2(a)

    BDA I 4303/BEX l 7003/BEE I 803

    FINAL EXAMINATION
    SEMESTER/SESION i lu20l2/2013

    PROGRAME: BDD
    COURSE CODE: BDAI4303 /

    COURSENAME :ELECTRICAL&ELECTRONICTECHNOLOGY

    BEXl7003/BEEl803

    I1
    --------||'

    fr'

    r,l

    20

    \'

    FIGURB O2ft)

    FIGURE O2(c)

    BDAr4303/BEX l7003/BEE r 803

    FINAL EXAMINATION
    SEMESTER/SESION I ll/2012/2013
    COURSE NAME
    :

    PROGRAME: BDD
    COURSE CODE: BDAI4303 /

    ELECTRICAL & ELECTRONIC TECHNOLOGY

    BEXI 7003/ BEE I 803

    FIGURE O3(aXiii)

    20mH

    '1OrnH

    40mH
    tYl l
    I
    I

    ii tl |

    -........... "-..1 i I

    L-\
    I

    i *".40mH
    J

    FIGURE O3ft)

    Vs:
    50 Cos (t)

    FIGURE O5(c)

    You might also like