Power Amplifiers Questions and Answers

Practice Mode
Showing 10 of 55 questions
Q21
By how much does the output signal vary for a class AB power amplifier?
  • A 360º
  • B 180º
  • C Between 180º and 360º
  • D Less than 180º
Answer: Option C
Q22
Which type of amplifier uses pulse (digital) signals in its operation?
  • A Class A
  • B Class B or AB
  • C Class C
  • D Class D
Answer: Option D
Q23
Which of the push-pull amplifiers is presently the most popular form of the class B power amplifier?
  • A Quasi-complementary
  • B Transformer-coupled
  • C Complementary-symmetry
  • D None of the above
Answer: Option A
Q24
Calculate the harmonic distortion component for an output signal having a fundamental amplitude of 3 V and a second harmonic amplitude of 0.25 V.
  • A 3.83%
  • B 38.3%
  • C 8.33%
  • D 83.3%
Answer: Option D
Q25
Which amplifier is commonly used as a frequency multiplier?
  • A class A
  • B class B
  • C class C
  • D all of the above
Answer: Option C
Q26
A class B amplifier operates in the linear region for
  • A slightly more than 180° of the input cycle.
  • B 360° of the input cycle.
  • C slightly less than 180° of the input cycle.
  • D much less than 180° of the input cycle.
Answer: Option C
Q27
Which of the following instruments displays the harmonics of a distorted signal?
  • A Digital multimeter
  • B Spectrum analyzer
  • C Oscilloscope
  • D Wave analyzer
Answer: Option B
Q28
Calculate the efficiency of a transformer-coupled class A amplifier for a supply of 15 V and an output of V(p) = 10 V.
  • A 25%
  • B 33.3%
  • C 50%
  • D 78.5%
Answer: Option B
Q29
________ amplifiers primarily provide sufficient power to an output load to drive a speaker from a few watts to tens of watts.
  • A Small-signal
  • B Power
  • C None of the above
Answer: Option B
Q30
You have an application for a power amplifier to operate on FM radio frequencies. The most likely choice would be a ________ amplifier.
  • A class A
  • B class B
  • C class C
  • D class AB
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