Multistage Transistor Amplifiers

21. RC coupling is used for __________ amplification

  1. Voltage
  2. Current
  3. Power
  4. None of the above

Correct answer: (A)
Voltage

22. The bandwidth of a single stage amplifier is __________ that of a multistage amplifier

  1. More than
  2. The same as
  3. Less than
  4. Data insufficient

Correct answer: (A)
More than

23. The best frequency response is of __________ coupling

  1. RC
  2. Transformer
  3. Direct
  4. None of the above

Correct answer: (C)
Direct

24. The ear is not sensitive to __________

  1. Frequency distortion
  2. Amplitude distortion
  3. Frequency as well as amplitude distortion
  4. None of the above

Correct answer: (A)
Frequency distortion

25. The final stage of a multistage amplifier uses __________

  1. RC coupling
  2. Transformer coupling
  3. Direct coupling
  4. Impedance coupling

Correct answer: (B)
Transformer coupling

26. The frequency response of transformer coupling is __________

  1. Good
  2. Very good
  3. Excellent
  4. Poor

Correct answer: (D)
Poor

27. The gain of an amplifier is expressed in db because __________

  1. It is a simple unit
  2. Calculations become easy
  3. Human ear response is logarithmic
  4. None of the above

Correct answer: (C)
Human ear response is logarithmic

28. The lower and upper cut off frequencies are also called __________ frequencies

  1. Sideband
  2. Resonant
  3. Half-resonant
  4. Half-power

Correct answer: (D)
Half-power

29. The noise factor of an ideal amplifier expressed in db is __________

  1. 0
  2. 1
  3. 1
  4. 10

Correct answer: (A)
0

30. The number of stages that can be directly coupled is limited because __________

  1. Changes in temperature cause thermal instability
  2. Circuit becomes heavy and costly
  3. It becomes difficult to bias the circuit
  4. None of the above

Correct answer: (A)
Changes in temperature cause thermal instability

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