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EEE :: Multistage Transistor Amplifiers

  1. The gain of an amplifier is expressed in db because ___________

  2. A.

     It is a simple unit

    B.

     Calculations become easy

    C.

     Human ear response is logarithmic

    D.

     None of the above


  3. RC coupling is not used to amplify extremely low frequencies because

  4. A.

     There is considerable power loss

    B.

     There is hum in the output

    C.

     Electrical size of coupling capacitor becomes very large

    D.

     None of the above


  5. A current amplification of 2000 is a gain of ___________

  6. A.

     3 db

    B.

     66 db

    C.

     20 db

    D.

     200 db


  7. If the power level of an amplifier reduces to half, the db gain will fall by .

  8. A.

     5 db

    B.

     2 db

    C.

     10 db

    D.

     3 db


  9. The number of stages that can be directly coupled is limited because

  10. A.

     Changes in temperature cause thermal instability

    B.

     Circuit becomes heavy and costly

    C.

     It becomes difficult to bias the circuit

    D.

     None of the above


  11. In the initial stages of a multistage amplifier, we use ___________

  12. A.

     RC coupling

    B.

     Transformer coupling

    C.

     Direct coupling

    D.

     None of the above


  13. A radio receiver has ___________ of amplification

  14. A.

     One stage

    B.

     Two stages

    C.

     Three stages

    D.

     More than one stages


  15. RC coupling is used for ___________ amplification

  16. A.

     Voltage

    B.

     Current

    C.

     Power

    D.

     None of the above


  17. Transformer coupling is used for ___________ amplification

  18. A.

     Power

    B.

     Voltage

    C.

     Current

    D.

     None of the above


  19. The lower and upper cut off frequencies are also called ___________ frequencies

  20. A.

     Sideband

    B.

     Resonant

    C.

     Half-resonant

    D.

     Half-power