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ECE :: Analog Electronics

  1. A CE amplifier is the most common BJT amplifier.

  2. A.
    True
    B.
    False

  3. The main drawback in the performance of shunt peaked wide band amplifier is

  4. A.
    two low gain at low frequency
    B.
    poor phase response
    C.
    reduce frequency at middle frequency
    D.
    that the maximum gain of the stage is small

  5. A generator with an internal resistance of 600 Ω drives an amplifier whose input resistance is 400 Ω. The generator's open circuit voltages is 1 mV; the amplifier develops 100mV across an 8kΩ load. The current amplification is

  6. A.
    2.5
    B.
    12.5
    C.
    25
    D.
    125

  7. In a CE amplifier circuit

  8. A.
    Q point must lie on both dc and ac load lines
    B.
    Q point lies on dc load line
    C.
    Q point lies on ac load line
    D.
    Q point lies may or may not lie on both dc and ac load lines

  9. In a push pull circuit the two transistors are

  10. A.
    both pnp
    B.
    both npn
    C.
    one pnp and other npn
    D.
    either (a) or (b)

  11. The oscillator shown in figure is a

  12. A.
    Colpitt's oscillator
    B.
    Hartley oscillator
    C.
    Tuned emitter oscillator
    D.
    Clapp oscillator

  13. In which configuration does output ac voltage appear between emitter and ground?

  14. A.
    CE
    B.
    CB
    C.
    CC
    D.
    Both CE and CB

  15. Figure represents a

  16. A.
    JFET shunt switching circuit
    B.
    JFET series switching circuit
    C.
    JFET analog switch
    D.
    multiplexing

  17. At high frequencies the output circuit of transistor amplifier reduces to

  18. A.
    a lead network
    B.
    a lag network
    C.
    either (a) or (b)
    D.
    neither (a) nor (b)

  19. A pulse transformer uses

  20. A.
    ferrite core
    B.
    air core
    C.
    iron core
    D.
    copper core