single stage transistor amplifiers MCQs – Page 2

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

single stage transistor amplifiers Mcqs
21. In transistor amplifiers, we generally use______________ capacitors?
comments icon0
A. Electrolytic

B. Mica

C. Paper

D. Air

22. A transistor amplifier has high output impedance because ______________?
comments icon0

A. Emitter is heavily doped

B. Collector has reverse bias

C. None of the above

D. Collector is wider than emitter or base

23. If the power and current gains of a transistor amplifier are 16500 and 100 respectively, then voltage gain is_____________________?
comments icon0

A. 165 x 104

B. 100

C. 165

D. None of the above

24. When an a.c. signal is applied to an amplifier, ,the operating point moves along_________________?
comments icon0

A. c. load line

B. c. load line

C. both d.c. and a.c. load lines

D. none of the above

25. An amplifier has a power gain of 100. Its db gain is ________________?
comments icon0

A. 10 db

B. 20 db

C. None of the above

D. 40 db

26. In a CE amplifier, voltage gain =____________________ x RAC/Rin?
comments icon0

A. (1 + ?)

B. (1+ ?)

C. ?

D. ?

27. The purpose of emitter capacitor (i.e. capacitor across RE) is to ______________?
comments icon0
A. Avoid voltage gain drop

B. Reduce noise in the amplifier

C. Forward bias the emitter

D. None of the above

28. The point of intersection of d.c. and a.c. load lines is called________________?
comments icon0
A. Operating point

B. Saturation point

C. Cut off point

D. None of the above

29. For highest power gain, one would use _________________configuration?
comments icon0

A. CC

B. CE

C. CB

D. none of the above

30. The slope of a.c. load line is ______________ that of d.c. load line?
comments icon0

A. The same as

B. Less than

C. More than

D. None of the above

31. The radio wave picked up by the receiving antenna is amplified about _________________ times to have reasonable sound output?
comments icon0
A. A million

B. 10000

C. 100

D. 1000

32. A CE amplifier is also called _______________ circuit?
comments icon0

A. None of the above

B. Grounded collector

C. Grounded base

D. Grounded emitter
33. In the d.c. equivalent circuit of a transistor amplifier, the capacitors are considered__________________?
comments icon0

A. None of the above

B. Short

C. Open

D. Partially short

34. When a transistor amplifier is operating, the current in any branch is _______________?
comments icon0

A. c. only

B. Sum of a.c. and d.c.

C. difference of a.c. and d.c.

D. c. only

35. In order to get more voltage gain from a transistor amplifier, the transistor used should have_________________?
comments icon0

A. Wide emitter

B. Thin collector

C. Thin base

D. None of the above

36. A single stage transistor amplifier contains______________ and associated circuitry?
comments icon0

A. Three transistor

B. Two transistors

C. One transistor

D. None of the above

37. If the input capacitor of a transistor amplifier is short-circuited, then_________________?
comments icon0
A. Biasing conditions will change

B. Transistor will be destroyed

C. Signal will not reach the base

D. None of the above

38. If a transistor amplifier feeds a load of low resistance (e.g. speaker), then voltage gain will be_______________?
comments icon0
A. Low

B. High

C. Very high

D. Moderate