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ECE :: Analog Electronics

  1. Which of the following contributes to harmonics distortion in amplifiers?

  2. A.
    Positive feedback
    B.
    Presence of noise
    C.
    Defective active device
    D.
    Non-linearity in active device

  3. Which of the following couplings may cause unwanted clamping?

  4. A.
    Resistive
    B.
    Inductive
    C.
    Capacitive
    D.
    Both (a) or (b)

  5. The name field effect is related to the __________ layers of a JFET.

  6. A.
    depletion
    B.
    drain
    C.
    source
    D.
    gate

  7. If input frequency is 50 Hz, the frequency of output wave in a half wave diode rectifier circuit is

  8. A.
    25 Hz
    B.
    50 Hz
    C.
    100 Hz
    D.
    200 Hz

  9. For an amplifier, the coupling method which gives the highest gain in

  10. A.
    impedance coupling
    B.
    transformer coupling
    C.
    capacitance coupling
    D.
    resistance coupling

  11. An ideal op-amp can amplify dc signals

  12. A.
    True
    B.
    False

  13. Consider the following statements :
    The lower cut off frequencies of an RC coupled amplifier depend on

    1. input and output coupling capacitor
    2. emitter by pass capacitors
    3. junction capacitances
    Which of the above are correct?

  14. A.
    1 only
    B.
    2 only
    C.
    1 and 2
    D.
    2 and 3

  15. Assertion (A): In a circuit using FET, gate is approximately at dc ground

    Reason (R): Self bias stabilizes the quiescent operating point against changes in JFET parameters

  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. The Darlington pair consists of the following two stages

  18. A.
    CE and CC
    B.
    both CE
    C.
    both CC
    D.
    CE and CB

  19. Figure represents

  20. A.
    Adder
    B.
    Multiplier
    C.
    Subtractor
    D.
    Log Amplifier