BJIt Amplifiers Questions and Answers

Practice Mode
Showing 10 of 46 questions
Q11
What is the unit of the parameter ho?
  • A Volt
  • B Ohm
  • C Siemen
  • D No unit
Answer: Option C
Q12
What is the range of the current gain for BJT transistor amplifiers?
  • A less than 1
  • B 1 to 100
  • C above 100
  • D All of the above
Answer: Option D
Q13
What does the negative sign in the voltage gain of the common-emitter fixed-bias configuration indicate?
  • A The output and input voltages are 180º out of phase.
  • B Gain is smaller than 1.
  • C Gain is larger than 1.
  • D None of the above
Answer: Option A
Q14
For the common-emitter fixed-bias configuration, there is a ________ phase shift between the input and output signals.
  • A 0º
  • B 45º
  • C 90º
  • D 180º
Answer: Option D
Q15
Which one of the following configurations has the lowest input impedance?
  • A Fixed-bias
  • B Common-base
  • C Emitter-follower
  • D Voltage-divider?
Answer: Option B
Q16
Which of the following represent(s) the advantage(s) of the system approach over the r-model approach?
  • A Thevenin's theorem can be used.
  • B The effect of changing the load can be determined by a simple equation.
  • C There is no need to go back to the ac equivalent model and analyze the entire network.
  • D All of the above
Answer: Option D
Q17
The differential amplifier has
  • A one input and one output.
  • B two inputs and two outputs.
  • C two inputs and one output.
  • D one input and two outputs.
Answer: Option B
Q18
The emitter-follower configuration has a ________ impedance at the input and a ________ impedance at the output.
  • A low, low
  • B low, high
  • C high, low
  • D high, high
Answer: Option C
Q19
The differential amplifier produces outputs that are
  • A common mode.
  • B in-phase with the input voltages.
  • C the sum of the two input voltages.
  • D the difference of the two input voltages.
Answer: Option D
Q20
The ________ configuration is frequently used for impedance matching.
  • A fixed-bias
  • B voltage-divider bias
  • C emitter-follower
  • D collector feedback
Answer: Option C

📚 More from Electronics

← All Topics 🎯 Practice ⏱️ Take Test 🔍 Search
Electronics
Back to Electronics
Other Subjects
Questions and Answers for Competitive Exams Various Entrance Test