If a three-stage amplifier has individual stage gains of 10 db, 5 db and 12 db, then total gain in db is____________?

Related Mcqs:

1. The total gain of a multistage amplifier is less than the product of the gains of individual stages due to____________?

   A. Power loss in the coupling device
   B. Loading effect of the next stage
   C. The use of many transistors
   The use of many capacitors

2. If the power and current gains of a transistor amplifier are 16500 and 100 respectively, then voltage gain is_____________________?

   A. 165
   B. 165 x 104
   C. 100
   D. None of the above

3. The bandwidth of a single stage amplifier is_____________that of a multistage amplifier?

   A. More than
   B. The same as
   C. Less than
   D. Data insufficient

4. An amplifier has a power gain of 100. Its db gain is ________________?

   A. 10 db
   B. 20 db
   C. 40 db
   D. None of the above

5. A 2-transistor class B power amplifier is commonly called ______________ amplifier?

   A. Dual
   B. Push-pull
   C. Symmetrical
   D. Differential

6. In an RC coupled amplifier, the voltage gain over mid-frequency range_____________?

   A. Changes abruptly with frequency
   B. Is constant
   C. Changes uniformly with frequency
   D. None of the above

7. The gain of an amplifier is expressed in db because_____________?

   A. It is a simple unit
   B. Calculations become easy
   C. Human ear response is logarithmic
   D. None of the above

8. An amplifier receives 0.1 W of input signal and delivers 15 W of signal power. What is the power gain in db?

   A. 8 db
   B. 6 db
   C. 5 db
   D. 4 db

9. If the power level of an amplifier reduces to half, the db gain will fall by___________?

   A. 5 db
   B. 2 db
   C. 10 db
   D. 3 db

10. In order to get more voltage gain from a transistor amplifier, the transistor used should have_________________?

    A. Thin base
    B. Thin collector
    C. Wide emitter
    D. None of the above