11. The upper or lower cut off frequency is also called ___________ frequency A. Resonant B. Sideband C. 3 db D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
12. The best frequency response is of ___________ coupling A. RC B. Transformer C. Direct D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
13. 1 db corresponds to ___________ change in voltage or current level A. 40% B. 80% C. 20% D. 25% Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
14. 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 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
15. 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 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
16. An advantage of RC coupling scheme is the ___________ A. Good impedance matching B. Economy C. High efficiency D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
17. 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 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
18. The power output of an audio system is 18 W. For a person to notice an increase in the output (loudness or sound intensity) of the system, what must the output power be increased to ? A. 2 W B. 6 W C. 68 W D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
19. A gain of 1,000,000 times in power is expressed by ___________ A. 30 db B. 60 db C. 120 db D. 600 db Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
20. A gain of 1000 times in voltage is expressed by ___________ A. 60 db B. 30 db C. 120 db D. 600 db Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
