Power amplifiers generally use transformer coupling because transformer permits______________?

Related Mcqs:

1. ________________ coupling is generally employed in power amplifiers?

   A. Transformer
   B. RC
   C. direct
   D. Impedance

2. Power amplifiers handle ______________ signals compare to voltage amplifiers?

   A. Small
   B. Very small
   C. Large
   D. None of the above

3. Transformer coupling is generally employed when load resistance is______________?

   A. Large
   B. Very large
   C. Small
   D. None of the above

4. The most costly coupling is _______________ coupling?

   A. RC
   B. Direct
   C. Impedance
   D. Transformer

5. In an RC coupling scheme, the coupling capacitor CC must be large enough______________?

   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

6. In RC coupling, the value of coupling capacitor is about_______________?

   A. 100 pF
   B. 0.1 µF
   C. 0.01 µF
   D. 10 µF

7. The output transformer used in a power amplifier is a _____________ transformer?

   A. 1:1 ratio
   B. Step-up
   C. Step-down
   D. None of the above

8. RC coupling is generally confined to low power applications because of____________?

   A. Large value of coupling capacitor
   B. Low efficiency
   C. Large number of components
   D. None of the above

9. In transistor amplifiers, we generally use______________ capacitors?

   A. Electrolytic
   B. Mica
   C. Paper
   D. Air

10. Transformer coupling can be used in______________amplifiers?

    A. Either power or voltage
    B. Only power
    C. Only voltage
    D. None of the above