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ECE :: Communication Systems

Communication Systems - Section 1
Communication Systems - Section 2
Communication Systems - Section 3
Communication Systems - Section 4
Communication Systems - Section 5
Communication Systems - Section 6
Communication Systems - Section 7
Communication Systems - Section 8
Communication Systems - Section 9
Communication Systems - Section 10
Communication Systems - Section 11
Communication Systems - Section 12
Communication Systems - Section 13
Communication Systems - Section 14
Communication Systems - Section 15
Communication Systems - Section 16
Communication Systems - Section 17
Communication Systems - Section 18
Communication Systems - Section 19
Communication Systems - Section 20
Communication Systems - Section 21
Communication Systems - Section 22
Communication Systems - Section 23
Communication Systems - Section 24
Communication Systems - Section 25
Communication Systems - section-26
Communication Systems - Section-27

  1. Audio systems use transverse recording.

    2. A.
    True
    B.
    False

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  2. In a CD player the laser uses

    3. A.
    silicon semiconductor
    B.
    silicon/germanium semiconductor
    C.
    aluminium gallium arsenide semiconductor
    D.
    none of the above

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  3. Leak type bias is used in a plate-modulated class C amplifier to

    4. A.
    prevent tuned circuit damping
    B.
    prevent over modulation
    C.
    increase the bandwidth
    D.
    prevent excessive grid current

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  4. FM broadcast is done using

    5. A.
    medium waves
    B.
    short waves
    C.
    VHF and UHF waves
    D.
    microwaves

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  5. A CW transmitter radiates

    6. A.
    modulated RF carrier
    B.
    unmodulated RF carrier
    C.
    both (a) and (b)
    D.
    none of the above

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  6. The commonly employed filter in SSB generation is

    7. A.
    high pass filter
    B.
    RC filter
    C.
    LC filter
    D.
    mechanical filter

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  7. The storage capacity of a CD is

    8. A.
    360 k bytes per side
    B.
    360 M bytes per side
    C.
    540 k bytes per side
    D.
    540 M bytes per side

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  8. Which of the following pulse modulation is analog?

    9. A.
    PCM
    B.
    Differential PCM
    C.
    PWM
    D.
    Delta

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  9. Pulse stuffing is used in

    10. A.
    synchronous TDM
    B.
    asynchronous TDM
    C.
    Any TDM
    D.
    All

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  10. Household taperecorders generally use

    11. A.
    crystal microphone
    B.
    moving coil microphone
    C.
    condenser microphone
    D.
    cardioid microphone

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