________________ coupling is generally employed in power amplifiers?

Related Mcqs:

1. Power amplifiers generally use transformer coupling because transformer permits______________?

   A. Cooling of the circuit
   B. Impedance matching
   C. Distortionless output
   D. Good frequency response

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. 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

8. In transistor amplifiers, we generally use______________ capacitors?

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

9. Class C amplifiers are used as ___________________?

   A. AF amplifiers
   B. Detectors
   A. amplifiers
   C. None of the above

10. In transistor amplifiers, we use_____________transformer for impedance matching?

    A. Step up
    B. Step down
    C. Same turn ratio
    None of the above