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EEE :: Multistage Transistor Amplifiers

  1. The upper or lower cut off frequency is also called ___________ frequency

  2. A.

     Resonant

    B.

     Sideband

    C.

     3 db

    D.

     None of the above


  3. The best frequency response is of ___________ coupling

  4. A.

     RC

    B.

     Transformer

    C.

     Direct

    D.

     None of the above


  5. 1 db corresponds to ___________ change in voltage or current level

  6. A.

     40%

    B.

     80%

    C.

     20%

    D.

     25%


  7. In an RC coupled amplifier, the voltage gain over mid-frequency range ___________

  8. A.

     Changes abruptly with frequency

    B.

     Is constant

    C.

     Changes uniformly with frequency

    D.

     None of the above


  9. In an RC coupling scheme, the coupling capacitor CC must be large enough ___________

  10. A.

     To pass d.c. between the stages

    B.

     Not to attenuate the low frequencies

    C.

     To dissipate high power

    D.

     None of the above


  11. An advantage of RC coupling scheme is the ___________

  12. A.

     Good impedance matching

    B.

     Economy

    C.

     High efficiency

    D.

     None of the above


  13. When a multistage amplifier is to amplify d.c. signal, then one must use coupling

  14. A.

     RC

    B.

     Transformer

    C.

     Direct

    D.

     None of the above


  15. The power output of an audio system is 18 W. For a person to notice an increase in the output (loudness or sound intensity) of the system, what must the output power be increased to ?

  16. A.

     2 W

    B.

     6 W

    C.

     68 W

    D.

     None of the above


  17. A gain of 1,000,000 times in power is expressed by ___________

  18. A.

     30 db

    B.

     60 db

    C.

     120 db

    D.

     600 db


  19. A gain of 1000 times in voltage is expressed by ___________

  20. A.

     60 db

    B.

     30 db

    C.

     120 db

    D.

     600 db