Multistage Transistor Amplifiers MCQ Questions & Answers | Electrical Engineering

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21.
1 db corresponds to ___________ change in power level

A. 50%

B. 35%

C. 26%

D. 22%

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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

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23.
The final stage of a multistage amplifier uses ___________

A. RC coupling

B. Transformer coupling

C. Direct coupling

D. Impedance coupling

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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

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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

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