Transistor Audio Power Amplifiers MCQ

Transistor Audio Power Amplifiers MCQ

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  • 21st Feb, 2023

Transistor Audio Power Amplifiers MCQ Questions

Take Transistor Audio Power Amplifiers MCQ Test to Test Your Knowledge

Practice here the best Transistor Audio Power Amplifiers MCQ Questions that checks your basic knowledge of Transistor Audio Power Amplifiers. This Transistor Audio Power Amplifiers MCQ Test contains 20+ Multiple Choice Questions. You have to select the right answer to the question. apart from this, you can also download Transistor Audio Power Amplifiers MCQ Pdf completly free.

Transistor Audio Power Amplifiers MCQ Test

1) What is called the output stage of a multistage amplifier?

  • A. F stage
  • B.Power stage
  • C.Mixer stage
  • D.Detector stage

2) Which of the following coupling is generally employed in power amplifiers?

  • A. RC
  • B.Direct
  • C.Impedance
  • D.Transformer

3) A class a power amplifier uses

  • A. One transistor
  • B.Two transistors
  • C.Three transistors
  • D.None of the above

4) The maximum efficiency of resistance loaded class a power amplifier is

  • A. 5%
  • B.25%
  • C.30%
  • D.50%

5) Which of the following class power amplifier has the highest collector efficiency?

  • A. A
  • B.B
  • C.C
  • D.AB

6) Power amplifiers handle …………. signals compare to voltage amplifiers.

  • A. Dual
  • B.Differential
  • C.Push-pull
  • D.Symmetrical

7) Which kind of coupling is the most costly coupling?

  • A. RC
  • B.Direct
  • C.Impedance
  • D.Transformer

8) What is the maximum collector efficiency of class B operation?

  • A. 60.50%
  • B.25%
  • C.78.50%
  • D.90%

9) When no signal is applied, the approximate collector efficiency of class a power amplifier is

  • A. 0%
  • B.10%
  • C.25%
  • D.50%

10) Power amplifiers generally use transformer coupling because transformer permits……..

  • A. Distortionless output
  • B.Cooling of the circuit
  • C.Impedance matching
  • D.None of the above

11) The disadvantage of impedance matching is that it

  • A. Gives distorted output
  • B.Requires a transformer
  • C.Gives low power output
  • D.None of the above

12) low efficiency of a power amplifier results in ..........

  • A. Low forward bias
  • B.Less battery consumption
  • C.More battery consumption
  • D.None of the above

13) The output transformer used in a power amplifier is a ............... transformer

  • A. 1:1 ratio
  • B.Step-up
  • C.Step-down
  • D.None of the above

14) A 2-transistor class B power amplifier is commonly called the

  • A. Dual Amplifier
  • B.Push-pull Amplifier
  • C.Differential Amplifier
  • D.Symmetrical Amplifier

15) The size of a power transistor is made considerably large to …………

  • A. Dissipate heat
  • B.Provide easy handling
  • C.Facilitate connections
  • D.None of the above

16) What is the most important consideration in a power amplifier?

  • A. Collector efficiency
  • B.Biasing the circuit
  • C.To keep the transformer cool
  • D.All of the Above

17) An AF amplifier is shielded to prevent induction due to stray magnetic fields.

  • A. True
  • B.False

18) Which of the following device was used for the amplification of audio signals before the invention of power amplifiers?

  • A. SCR
  • B.Diode
  • C.Op-amp
  • D.Vacuum tubes

19) What does the power amplifier directly amplifies?

  • A. Voltage of signal
  • B.Power of the signal
  • C.Current of the signal
  • D.All of the above

20) ............. audio speaker will be hard to be driven by a power amplifier.

  • A. 2ohm
  • B.4ohm
  • C.8ohm
  • D.12ohm

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