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ECE :: Analog Electronics

Analog Electronics - Section 1
Analog Electronics - Section 2
Analog Electronics - Section 3
Analog Electronics - Section 4
Analog Electronics - Section 5
Analog Electronics - Section 6
Analog Electronics - Section 7
Analog Electronics - Section 8
Analog Electronics - Section 9
Analog Electronics - section-1
Analog Electronics - Section 10
Analog Electronics - Section 11
Analog Electronics - Section 12
Analog Electronics - Section 13
Analog Electronics - Section 14
Analog Electronics - Section 15
Analog Electronics - Section 16
Analog Electronics - Section 17
Analog Electronics - Section 18
Analog Electronics - Section 19
Analog Electronics - Section 20
Analog Electronics - Section 21
Analog Electronics - section-22
Analog Electronics - Section-23

  1. A Clapp's oscillator is

    2. A.
    a modified Hartley oscillator
    B.
    a modified Colpitt's oscillator
    C.
    a modified RC oscillator
    D.
    none of the above

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  2. In the circuit shown in the figure, the approximate voltage at the transistor,

    3. A.
    base and emitter respectively are -8 V and -7.3 V
    B.
    base and collector respectively are -8 V and -5 V
    C.
    Collector and emitter respectively are -5 V and -7.3
    D.
    base, emitter and collector respectively are -8 V, 7.3 V and -5 V

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  3. A quiescent state of a transistor implies

    4. A.
    zero bias
    B.
    no output
    C.
    no distortion
    D.
    no input signal

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  4. A transistor may fail due to

    5. A.
    open weld at the wire leads to the semi-conductor
    B.
    short circuit caused by momentary overloads
    C.
    overheating due to circuit failures
    D.
    any of the above

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  5. In a P-N-P transistor, with normal bias, the emitter junction

    6. A.
    is always reverse biased
    B.
    offers very high resistance
    C.
    offers a low resistance
    D.
    remains open

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  6. In a tuned class C power amplifier the quiescent value of collector to emitter voltage is equal to (VCC denotes collector battery voltage)

    7. A.
    VCC
    B.
    0.5 VCC
    C.
    0.25 VCC
    D.
    either (b) or (c)

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  7. Volt equivalent temperature in a PN Junction diode is

    8. A.
    B.
    C.
    D.
    11600 T

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  8. Primary advantage of a crystal oscillator is that

    9. A.
    it can oscillate at any frequency
    B.
    it gives a high O/P voltage
    C.
    its frequency of oscillation remains almost constant
    D.
    it operates on a very low dc supply voltage

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  9. The conversion or collector circuit efficiency is a measure

    10. A.
    how successfully the active device converts D.C. power to A.C. signal power
    B.
    how much distortion in output is reduced with respect to input
    C.
    how successfully the active device converts A.C. power to D.C. signal power
    D.
    none of the above

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  10. A transistor amplifier is operating in class A mode. If a transformer is connected for impedance matching, the efficiency will

    11. A.
    increase
    B.
    decrease
    C.
    not be affected
    D.
    increase or decrease

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