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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. Assertion (A): An op-amp amplifier can amplify dc signal

    Reason (R): An op-amp amplifier is a direct coupled amplifier

    2. 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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  2. The most common method for biasing a JFET is

    3. A.
    reverse bias
    B.
    self bias
    C.
    voltage divider bias
    D.
    none of the above

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  3. Which of the following figures is an ideal equivalent circuit of a n-p-n transistor?

    4. A.
    figure A
    B.
    figure B
    C.
    figure C
    D.
    none

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  4. Which op-amp circuit uses a capacitor in series with input and resistance in feedback path?

    5. A.
    Differentiating amplifier
    B.
    Integrating amplifier
    C.
    Logarithmic amplifier
    D.
    None of the above

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  5. For class B operation the theoretical maximum efficiency is

    6. A.
    100%
    B.
    78.5%
    C.
    50%
    D.
    27.5%

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  6. Typical values of current gains for CE, CB and CC amplifiers are

    7. A.
    120, 120 and 1 respectively
    B.
    120, 1 and 120 respectively
    C.
    1, 120 and 120 respectively
    D.
    1, 1 and 120 respectively

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  7. To draw ac equivalent circuit for a CE amplifier we should

    8. A.
    Reduce all dc sources to zero
    B.
    Short all capacitors
    C.
    Reduce all dc sources to zero and short all capacitors
    D.
    Reduce all dc sources to zero and open all capacitors

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  8. In the circuit of figure, the value of re is (neglecting vbe)

    9. A.
    100 Ω
    B.
    75 Ω
    C.
    50 Ω
    D.
    25 Ω

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