11. 1 db corresponds to_____________change in power level?
A. 50%
B. 35%
C. 26%
D. 22%
✅ The correct answer is option C.
Multi-Stage Transistor Amplifiers MCQs
12. When a multistage amplifier is to amplify d.c. signal, then one must use_____________coupling?
A. RC
B. Transformer
C. Direct
D. None of the above
✅ The correct answer is option C.
13. The final stage of a multistage amplifier uses______________?
A. RC coupling
B. Transformer coupling
C. Direct coupling
D. Impedance coupling
✅ The correct answer is option B.
14. RC coupling is used for_____________amplification?
A. Voltage
B. Current
C. Power
D. None of the above
✅ The correct answer is option A.
15. _____________coupling provides the maximum voltage gain?
A. RC
B. Transformer
C. Direct
D. Impedance
✅ The correct answer is option B.
16. The noise factor of an ideal amplifier expressed in db is_____________?
A. 0
B. 1
C. 1
D. 10
✅ The correct answer is option A.
17. Transformer coupling is used for__________amplification?
A. Power
B. Voltage
C. Current
D. None of the above
✅ The correct answer is option A.
18. 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
✅ The correct answer is option D.
19. An advantage of RC coupling scheme is the___________?
A. Good impedance matching
B. Economy
C. High efficiency
D. None of the above
✅ The correct answer is option B.
20. The ear is not sensitive to___________?
A. Frequency distortion
B. Amplitude distortion
C. Frequency as well as amplitude distortion
None of the above
✅ The correct answer is option A.