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MCQs

Analog Electronics

Total Questions : 482 | Page 4 of 49 pages
Question 31. A dc power supply has no-load voltage of 30v,and a full-load voltage of 25v at full-load current of 1a.its output resistance & load regulation ,respectively are
  1.     5 Ω & 20 %
  2.     25 Ω & 20 %
  3.     5 Ω & 16.7 %
  4.     25 Ω & 16.7 %
 Discuss Question
Answer: Option B. ->  25 Ω & 20 %
Question 32. Which of the following amplifier circuit using junction transistor has the best gain?
  1.     Common base
  2.     Common emitter
  3.     Common collector
  4.     All have the same gain
 Discuss Question
Answer: Option B. ->  Common emitter
Question 33. When a transistor is connected in common emitter mode, it with have
  1.     Negligible input resistance and high output resistance
  2.     High input resistance and low output resistance
  3.     Medium input resistance and high output resistance
  4.     Low input resistance as well as output resistance
 Discuss Question
Answer: Option C. ->  Medium input resistance and high output resistance
Question 34. In all base driver amplifiers
  1.     ac collector voltage is 180° out of phase with ac base voltage
  2.     ac emitter voltage is 180° out of phase with ac base voltage
  3.     ac collector voltage is in phase with ac base voltage
  4.     none of the above
 Discuss Question
Answer: Option A. ->  ac collector voltage is 180° out of phase with ac base voltage
Question 35. The effective channel length of a mosfet in a saturation decreases with increase in
  1.     Gate voltage
  2.     Drain voltage
  3.     Source voltage
  4.     Body voltage
 Discuss Question
Answer: Option B. ->  Drain voltage
Question 36. The encapsulation of transistor is necessary for
  1.     Preventing radio interference
  2.     Preventing photo-emission effects
  3.     Avoiding loss of free electrons
  4.     Mechanical ruggedness
 Discuss Question
Answer: Option D. ->  Mechanical ruggedness
Question 37. In a p⁺n junction diode under reverse bias , the magnitude of electric field is maximum at
  1.     The edge of the depletion region on the p-side
  2.     The edge of the depletion region on the n-side
  3.     The p⁺n junction
  4.     The center of the depletion region on the n-side
 Discuss Question
Answer: Option C. ->  The p⁺n junction
Question 38. In a p⁺n junction diode under reverse bias , the magnitude of electric field is maximum at
  1.     The edge of the depletion region on the p-side
  2.     The edge of the depletion region on the n-side
  3.     The p⁺n junction
  4.     The center of the depletion region on the n-side
 Discuss Question
Answer: Option C. ->  The p⁺n junction
Question 39. In a p⁺n junction diode under reverse bias , the magnitude of electric field is maximum at
  1.     The edge of the depletion region on the p-side
  2.     The edge of the depletion region on the n-side
  3.     The p⁺n junction
  4.     The center of the depletion region on the n-side
 Discuss Question
Answer: Option C. ->  The p⁺n junction
Question 40. A constant current signal across a parallel rlc circuits gives an o/p of 1.4v at the signal frequency of 3.89khz and 4.1khz. at the frequency of 4khz,the o/p voltage will be
  1.     1v
  2.     2v
  3.     1.4v
  4.     2.8v
 Discuss Question
Answer: Option B. ->  2v

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