Sail E0 Webinar

MCQs

Total Questions : 163 | Page 4 of 17 pages
Question 31. What will be the collector efficiency of a power amplifier having zero signal power dissipation of 5 watts and a.c. power output of 2 watts?
  1.    20%
  2.    80%
  3.    40%
  4.    50%
 Discuss Question
Answer: Option C. -> 40%
Question 32. A transformer coupled class A power amplifier has a load of 100 Ω on the secondary. If the turn ratio is 10:1, what is the value of load appearing on the primary?
  1.    5 kΩ
  2.    20 kΩ
  3.    100 kΩ
  4.    10 kΩ
 Discuss Question
Answer: Option D. -> 10 kΩ
Question 33. When a transistor is cut off___________
  1.    Maximum voltage appears across transistor
  2.    Maximum current flows
  3.    Maximum voltage appears across load
  4.    None of the above
 Discuss Question
Answer: Option A. -> Maximum voltage appears across transistor
Question 34. Low efficiency of a power amplifier results in ___________
  1.    Low forward bias
  2.    Less battery consumption
  3.    More battery consumption
  4.    None of the above
 Discuss Question
Answer: Option C. -> More battery consumption
Question 35. If the gain versus frequency curve of a transistor amplifier is not flat, then there is distortion.
  1.    Amplitude
  2.    Intermodulation
  3.    Frequency
  4.    None of the above
 Discuss Question
Answer: Option C. -> Frequency
Question 36. A power amplifier has comparatively ___________ ß
  1.    Small
  2.    Large
  3.    Very large
  4.    None of the above
 Discuss Question
Answer: Option A. -> Small
Question 37. Power amplifiers generally use transformer coupling because transformer per-mits
  1.    Cooling of the circuit
  2.    Impedance matching
  3.    Distortionless output
  4.    Good frequency response
 Discuss Question
Answer: Option B. -> Impedance matching
Question 38. The driver stage usually employs___________
  1.    Class A power amplifier
  2.    Push-pull amplifier
  3.    Class C amplifier
  4.    None of the above
 Discuss Question
Answer: Option A. -> Class A power amplifier
Question 39. The output stage of a multistage amplifier usually employs ___________
  1.    Push-pull amplifier
  2.    Preamplifier
  3.    Class A power amplifier
  4.    None of the above
 Discuss Question
Answer: Option A. -> Push-pull amplifier
Question 40. ___________ coupling is generally employed in power amplifiers
  1.    Transformer
  2.    RC
  3.    direct
  4.    Impedance
 Discuss Question
Answer: Option A. -> Transformer

Latest Videos
Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)
Direction Sense Test Part 1 Reasoning (Hindi)
Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE
Cube & Cuboid Part 1 Reasoning (Hindi)
Data Interpretation (DI) Basic Concept Reasoning (Hindi)
Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)
Sail E0 free webinar Webinars
Real Numbers Part 7 Class 10 Maths
Real Numbers Part 1 Class 10 Maths
Polynomials Part 1 Class 10 Maths

Latest Test Papers

Pie Chart - Test Paper 1 Data Interpretation Reasoning & DI
Tabulation - Test Paper 2 Data Interpretation Reasoning & DI
Test Paper 1 Direction Sense Test Reasoning & DI
ICA , RDIC,GFM Free Modal Test Paper - Non - Technical Branch Old Syllabus 2022 - SAIL Junior Officer E0
GFM Combined 1 Free Revision Test SAIL JO E-0