The gain of an amplifier is expressed in db because_____________?

Related Mcqs:

1. 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

2. 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

3. The noise factor of an ideal amplifier expressed in db is_____________?

   A. 0
   B. 1
   C. 1
   D. 10

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

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

5. 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

6. 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

7. 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

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

   A. 600 db
   B. 24 db
   C. 14 db
   D. 27 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. A gain of 1,000,000 times in power is expressed by_____________?

    A. 30 db
    B. 60 db
    C. 120 db
    D. 600 db