Transistors Archives - Page 6 of 10 - MCQ and Quiz for Exams

51. The base resistor method is generally used in

Amplifier circuits

Switching circuits

Rectifier circuits

None of the above

Detailed SolutionThe base resistor method is generally used in

52. The point of intersection of d.c. and a.c. load lines represents ___________

Operating point

Current gain

Voltage gain

None of the above

Detailed SolutionThe point of intersection of d.c. and a.c. load lines represents ___________

53. In parallel resonance, there is ___________

Both voltage and current amplification

Voltage amplifications

Current amplification

None of the above

Detailed SolutionIn parallel resonance, there is ___________

54. The voltage gain of a tuned amplifier is ___________ at resonant frequency

Minimum

Maximum

Half-way between maximum and minimum

Zero

Detailed SolutionThe voltage gain of a tuned amplifier is ___________ at resonant frequency

55. In a transistor if Ã = 100 and collector current is 10 mA, then IE is ___________

100 mA

10.1 mA

110 mA

none of the above

Detailed SolutionIn a transistor if Ã = 100 and collector current is 10 mA, then IE is ___________

56. The value of Ã for a transistor is generally ___________

1

less than 1

between 20 and 500

above 500

Detailed SolutionThe value of Ã for a transistor is generally ___________

57. The power gain in a transistor connected in ___________ arrangement is the highest

common emitter

common base

common collector

none of the above

Detailed SolutionThe power gain in a transistor connected in ___________ arrangement is the highest

58. In the above question, what are the values of cut-off frequencies?

140 kHz , 60 kHz

1020 kHz , 980 kHz

1030 kHz , 970 kHz

None of the above

Detailed SolutionIn the above question, what are the values of cut-off frequencies?

59. For good stabilsation in voltage divider bias, the current I1 flowing through R1 and R2 should be equal to or greater than

10 IB

3 IB

2 IB

4 IB

Detailed SolutionFor good stabilsation in voltage divider bias, the current I1 flowing through R1 and R2 should be equal to or greater than

60. At the base emitter junctions of a transistor, one finds ___________

a reverse bias

a wide depletion layer

low resistance

none of the above

Detailed SolutionAt the base emitter junctions of a transistor, one finds ___________

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