21. 1 db corresponds to ___________ change in power level A. 50% B. 35% C. 26% D. 22% 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
22. 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 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
23. The final stage of a multistage amplifier uses ___________ A. RC coupling B. Transformer coupling C. Direct coupling D. Impedance coupling 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
24. In obtaining the frequency response curve of an amplifier, the ___________ A. Amplifier level output is kept constant B. Amplifier frequency is held constant C. Generator frequency is held constant D. Generator output level is held constant Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
25. 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 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
