transistor biasing MCQs – Page 2

Practise focused transistor biasing questions with marked answers for exam preparation and subject revision.

transistor biasing Mcqs
21. The point of intersection of d.c. and a.c. load lines represents __________________?
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A. Operating point

B. None of the above

C. Voltage gain

D. Current gain

22. When the temperature changes, the operating point is shifted due to _______________?
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A. Change in the values of circuit resistance

B. Change in ICBO

C. Change in VCC

D. None of the above

23. The operating point is also called the _______________?
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A. Cut off point

B. Saturation point

C. None of the above

D. Quiescent point
24. The disadvantage of voltage divider bias is that it has _________________?
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A. Low base current

B. None of the above

C. Many resistors

D. High stability factor

25. For faithful amplification by a transistor circuit, the value of VBE should_____________for a silicon transistor?
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A. Be zero

B. Not fall below 0.7 V

C. Be between 0 V and 0.1 V

D. Be 0.01 V

26. If the temperature increases, the value of VCE_________________?
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A. Is decreased

B. Remains the same

C. Is increased

D. None of the above

27. The zero signal IC is generally ______________ mA in the initial stages of a transistor amplifier?
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A. More than 10

B. 1

C. 3

D. 4

28. The circuit that provides the best stabilization of operating point is___________________?
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A. Potential divider bias

B. Base resistor bias

C. None of the above

D. Collector feedback bias

29. Transistor biasing is generally provided by a_______________?
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A. Biasing circuit

B. Bias battery

C. Diode

D. None of the above

30. For proper operation of the transistor, its collector should have___________________?
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A. Proper forward bias

B. Very small size

C. Proper reverse bias

D. None of the above

31. In a particular biasing circuit, the value of RE is about _________________?
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A. 10 kO

B. 800 O

C. 1 MO

D. 100 kO

32. In voltage divider bias, VCC = 25 V; R1 = 10 kO; R2 = 2.2 V ; RC = 3.6 V and RE =1 kO. What is the emitter voltage?
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A. V

B. 8 V

C. 7 V

D. 3 V

33. The purpose of resistance in the emitter circuit of a transistor amplifier is to _________________?
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A. Provide base-emitter bias

B. None of the above

C. Limit the maximum emitter current

D. Limit the change in emitter current
34. The biasing circuit has a stability factor of 50. If due to temperature change, ICBO changes by 1 A, then IC will change by___________________?
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A. 20 A

B. 50 A

C. 25 A

D. 100 A

35. Transistor biasing is done to keep _____________in the circuit?
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A. Proper alternating current

B. Collector current small

C. The base current small

D. Proper direct current
36. The base resistor method is generally used in ________________?
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A. Rectifier circuits

B. Amplifier circuits

C. None of the above

D. Switching circuits
37. For germanium transistor amplifier, VCE should_______________for faithful amplification?
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A. None of the above

B. Be zero

C. Be 0.2 V

D. Not fall below 0.7 V
38. The operating point ________________ on the a.c. load line?
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A. Also line

B. May or may not lie

C. Data insufficient

D. Does not lie

39. In the above question (Q38.) , what is the collector voltage ?
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A. 6 V

B. 8 V

C. 3 V

D. 7 V

40. If the value of collector current IC increases, then the value of VCE ______________?
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A. Remains the same

B. None of the above

C. Increases

D. Decreases