Transistor Biasing(Electrical Engineering Questions ) Questions and Answers

Question 1. The purpose of resistance in the emitter circuit of a transistor amplifier is to _________________?
  1.    Limit the maximum emitter current
  2.    Provide base-emitter bias
  3.    Limit the change in emitter current
  4.    None of the above
Explanation:-
Answer: Option C. -> Limit the change in emitter current
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2. In the above question (Q38.) , what is the collector voltage ?
  1.    3 V
  2.    8 V
  3.    6 V
  4.    7 V
Explanation:-
Answer: Option A. -> 3 V
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3. If the value of collector current IC increases, then the value of VCE ______________?
  1.    Remains the same
  2.    Decreases
  3.    Increases
  4.    None of the above
Explanation:-
Answer: Option B. -> Decreases
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4. When the temperature changes, the operating point is shifted due to _______________?
  1.    Change in ICBO
  2.    Change in VCC
  3.    Change in the values of circuit resistance
  4.    None of the above
Explanation:-
Answer: Option A. -> Change in ICBO
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 5. The base resistor method is generally used in ________________?
  1.    Amplifier circuits
  2.    Switching circuits
  3.    Rectifier circuits
  4.    None of the above
Explanation:-
Answer: Option B. -> Switching circuits
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 6. A silicon transistor is biased with base resistor method. If ß=100, VBE =0.7 V, zero signal collector current IC = 1 mA and VCC = 6V , what is the value of the base resistor RB ?
  1.    105 kO
  2.    530 kO
  3.    315 kO
  4.    None of the above
Explanation:-
Answer: Option B. -> 530 kO
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 7. In a base resistor method, if the value of ß changes by 50, then collector current will change by a factor ___________________?
  1.    25
  2.    50
  3.    100
  4.    200
Explanation:-
Answer: Option B. -> 50
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 8. In a particular biasing circuit, the value of RE is about _________________?
  1.    10 kO
  2.    1 MO
  3.    100 kO
  4.    800 O
Explanation:-
Answer: Option D. -> 800 O
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 9. The stabilisation of operating point in potential divider method is provided by_______________?
  1.    RE consideration
  2.    RC consideration
  3.    VCC consideration
  4.    None of the above
Explanation:-
Answer: Option A. -> RE consideration
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 10. The value of VBE ___________________?
  1.    Depends upon IC to moderate extent
  2.    Is almost independent of IC
  3.    Is strongly dependant on IC
  4.    None of the above
Explanation:-
Answer: Option B. -> Is almost independent of IC
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
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