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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. Negative feedback in amplifier

    2. A.
    reduces gain
    B.
    increases frequency and phase distortion
    C.
    reduces bandwidth
    D.
    increases noise

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  2. Which of the following is the fastest switching device?

    3. A.
    JFET
    B.
    BJT
    C.
    MOSFET
    D.
    Triode

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  3. Which of the following is not valid in case of bipolars?

    4. A.
    It has a low input impedance
    B.
    It has high voltage gain
    C.
    It is a current controlled device
    D.
    It is difficult to bias

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  4. The input resistance of JFET ideally approaches

    5. A.
    zero
    B.
    1 ohm
    C.
    100 ohm
    D.
    infinity

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  5. In the analysis of common emitter amplifier we may neglect

    6. A.
    hre
    B.
    hoe
    C.
    hfe
    D.
    hie

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  6. The ac input voltage of an amplifier

    7. A.
    is always equal to ac signal voltage
    B.
    may be equal to or more than ac signal voltage
    C.
    is always less than ac signal voltage
    D.
    may be equal or more or less than ac signal voltage

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  7. Assertion (A): Negative feedback reduces the gain of an amplifier

    Reason (R): Negative feedback is very commonly used in amplifier circuits

    8. A.
    Both A and R are correct and R is correct explanation for A
    B.
    Both A and R are correct but R is not correct explanation for A
    C.
    A is correct R is wrong
    D.
    A is wrong R is correct

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  8. In figure the coordinates of Q point on the load line are (Neglect VBE)

    9. A.
    IC = 10 mA, VCE = 15 V
    B.
    IC = 5 mA, VCE = 22.5 V
    C.
    IC = 5 mA, VCE = 15 V
    D.
    IC = 10 mA, VCE = 22.5 V

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  9. In the re model of a BJT amplifier, the ac resistance of diode at room temperature is about (IE is quiescent emitter current)

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  10. The emitter resistor RE in the emitter of CE amplifier stabilizes the dc operating point against variation in

    11. A.
    temperature only
    B.
    β of transistor
    C.
    both temperature and β
    D.
    none of the above

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