Power Amplifiers Questions and Answers

Practice Mode
Showing 10 of 55 questions
Q41
The maximum efficiency of a class B amplifier is ________ percent.
  • A 50
  • B 25
  • C 70
  • D 79
Answer: Option D
Q42
A class ________ amplifier is biased slightly above cutoff and operates in the linear region for slightly more than 180º of the input cycle.
  • A A
  • B B
  • C C
  • D AB
Answer: Option D
Q43
The class ________ amplifier is biased below cutoff.
  • A A
  • B AB
  • C B
  • D C
Answer: Option D
Q44
nMOS and pMOS transistors can be used for class B.
  • A TRUE
  • B FALSE
Answer: Option A
Q45
A class C amplifier has a tank circuit in the output. The amplifier is conducting only 28°. The output voltage is
  • A 0 V.
  • B a dc value equal to VCC.
  • C a sine wave.
  • D a square wave with a frequency determined by the tank.
Answer: Option C
Q46
What is the maximum efficiency of a class B circuit?
  • A 90%
  • B 78.5%
  • C 50%
  • D 25%
Answer: Option B
Q47
A class C amplifier is a linear amplifier.
  • A TRUE
  • B FALSE
Answer: Option B
Q48
In a class B push-pull amplifier, crossover distortion occurs when both transistors are off and the input signal voltage must exceed VBE before a transistor conducts.
  • A TRUE
  • B FALSE
Answer: Option A
Q49
Class AB operation always requires a dual (+/–) supply.
  • A TRUE
  • B FALSE
Answer: Option B
Q50
Class A amplifiers operate in the active region of the load line all of the time.
  • A TRUE
  • B FALSE
Answer: Option A

📚 More from Electronics

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