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ECE :: Analog Electronics

  1. Which of the following are linear ICs?

  2. A.
    RF and IF amplifiers
    B.
    Wide band amplifier
    C.
    Audio amplifiers
    D.
    All of the above

  3. The more negative gate voltage, the conductive channel becomes

  4. A.
    narrower
    B.
    wider
    C.
    thicker
    D.
    linear

  5. Which circuit has its output signal from, the emitter?

  6. A.
    Common base
    B.
    Common emitter
    C.
    Emitter follower
    D.
    None of the above

  7. Symbol shown in figure represents a

  8. A.
    P-channel DEMOSFET
    B.
    N-channel DEMOSFET
    C.
    UJT with N-type base
    D.
    UJT with P-type base

  9. A JFET is a

  10. A.
    unipolar device
    B.
    bipolar device
    C.
    tripolar device
    D.
    none of the above

  11. Which configuration has high input impedance and low output impedance?

  12. A.
    CB
    B.
    CE
    C.
    CC
    D.
    CB and CE

  13. Assertion (A): An ac amplifier uses coupling capacitors at input and output

    Reason (R): The capacitive reactance varies inversely with frequency. It is infinite for dc

  14. 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

  15. Common base configuration is little used because

  16. A.
    it has low input impedance
    B.
    it has high input impedance
    C.
    it does not heat up
    D.
    it has very high gain

  17. In figure it is desired that output wave is symmetrical. Then

  18. A.
    both diodes should be similar and |V1| = |V2|
    B.
    both diodes should be similar
    C.
    |V1| = |V2|
    D.
    either (a) or (b)

  19. If the plate supply voltage for a plate modulated class C amplifier is E volts, the maximum plate-cathode voltage could be almost as high as

  20. A.
    E
    B.
    E/2
    C.
    2E
    D.
    4E