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ECE :: Analog Electronics

  1. Symbol shown in figure represents a

  2. A.
    P-channel DMOSFET
    B.
    N-channel DMOSFET
    C.
    UJT with P-type base
    D.
    UJT with N-type base

  3. Figure shows basic Hartley oscillator configuration. Do you think the polarities marked for the split coiled are correct?

  4. A.
    yes they are
    B.
    no they are not
    C.
    it really doesn't matter
    D.
    none of the above

  5. If the Q of a single-stage single-tuned amplifier is doubled, then its bandwidth will

  6. A.
    remain same
    B.
    become half
    C.
    become doubled
    D.
    become four times

  7. A boot strap generally incorporates

  8. A.
    CB configuration
    B.
    CE configuration
    C.
    emitter follower
    D.
    none of the above

  9. The common-drain amplifier, better known as the source follower, has a voltage gain __________ and the output signal is __________ with the input signal.

  10. A.
    approaching unity, in phase
    B.
    approaching unity, out of phase
    C.
    is very high, in phase
    D.
    is very high, in reverse phase

  11. In CB amplifier the distortion of the input voltage waveform may occur due to

  12. A.
    very low input resistance of an amplifier
    B.
    very high input resistance of the amplifier
    C.
    improper biasing
    D.
    ripples in power supply

  13. As compared to full wave rectifier, a half wave rectifier

  14. A.
    has higher ripple factor
    B.
    has lower ripple factor
    C.
    may have higher or lower ripple factor
    D.
    has same ripple factor

  15. Assertion (A): A self bias circuit is the most commonly used bias circuit for bipolar junction transistors

    Reason (R): A self bias circuit limits the increase in collector or emitter current due to change in junction temperature.

  16. 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

  17. In an amplifier if conductor during the cycle is from 0 to 90° and again from 180° to 270°, the amplifier will be termed as

  18. A.
    class A
    B.
    class B
    C.
    class C
    D.
    class AB

  19. A sine wave with slew rate distortion looks like

  20. A.
    step wave
    B.
    square wave
    C.
    triangular wave
    D.
    cosine wave