multi stage transistor amplifiers MCQs – Page 2

Practise focused multi stage transistor amplifiers questions with marked answers for exam preparation and subject revision.

multi stage transistor amplifiers Mcqs

21. The purpose of RC or transformer coupling is to_____________?
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A. e of the above

B. Increase thermal stability

C. Block a.c.

D. Separate bias of one stage from another

22. RC coupling is generally confined to low power applications because of____________?
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A. Large number of components

B. None of the above

C. Low efficiency

D. Large value of coupling capacitor

23. An advantage of RC coupling scheme is the___________?
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A. High efficiency

B. Economy

C. None of the above

D. Good impedance matching

24. 1 db corresponds to_____________change in power level?
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A. 35%

B. 22%

C. 50%

D. 26%

25. In obtaining the frequency response curve of an amplifier, the______________?
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A. Generator output level is held constant

B. Generator frequency is held constant

C. Amplifier frequency is held constant

D. Amplifier level output is kept constant

26. When a multistage amplifier is to amplify d.c. signal, then one must use_____________coupling?
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A. Transformer

B. RC

C. None of the above

D. Direct

27. The final stage of a multistage amplifier uses______________?
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A. Impedance coupling

B. RC coupling

C. Direct coupling

D. Transformer coupling

28. If a three-stage amplifier has individual stage gains of 10 db, 5 db and 12 db, then total gain in db is____________?
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A. 14 db

B. 27 db

C. 600 db

D. 24 db

29. If the power level of an amplifier reduces to half, the db gain will fall by___________?
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A. 2 db

B. 10 db

C. 3 db

D. 5 db

30. The lower and upper cut off frequencies are also called_____________frequencies?
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A. Resonant

B. Half-resonant

C. Sideband

D. Half-power

31. The best frequency response is of_____________coupling?
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A. None of the above

B. RC

C. Transformer

D. Direct

32. In an RC coupling scheme, the coupling capacitor CC must be large enough______________?
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A. Not to attenuate the low frequencies

B. To dissipate high power

C. None of the above

D. To pass d.c. between the stages

33. The total gain of a multistage amplifier is less than the product of the gains of individual stages due to____________?
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A. use of many capacitors

B. Power loss in the coupling device

C. The use of many transistors

D. Loading effect of the next stage

34. The frequency response of transformer coupling is___________?
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A. Excellent

B. Poor

C. Good

D. Very good

35. A radio receiver has____________of amplification?
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A. Three stages

B. Two stages

C. More than one stages

D. One stage

36. Transformer coupling is used for__________amplification?
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A. Current

B. Power

C. None of the above

D. Voltage

37. 1 db corresponds to_____________change in voltage or current level?
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A. 40%

B. 25%

C. 20%

D. 80%

38. Transformer coupling is generally employed when load resistance is______________?
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A. None of the above

B. Small

C. Very large

D. Large

39. _____________coupling provides the maximum voltage gain?
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A. Transformer

B. Direct

C. Impedance

D. RC

40. The gain of an amplifier is expressed in db because_____________?
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A. Calculations become easy

B. It is a simple unit

C. None of the above

D. Human ear response is logarithmic

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