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MCQs

Total Questions : 90 | Page 4 of 9 pages
Question 31. The amount of photoelectric emission current depends on
  1.    Frequency of incident radiation
  2.    Intensity of incident radiation
  3.    Both frequency and intensity of incident radiation
  4.    None of the above
 Discuss Question
Answer: Option C. -> Both frequency and intensity of incident radiation
Question 32. The sensitivity of human eyes is maximum at
  1.    White portion of spectrum
  2.    Green portion of spectrum
  3.    Red portion of spectrum
  4.    Violet portion of spectrum
 Discuss Question
Answer: Option B. -> Green portion of spectrum
Question 33. The sensitivity of human eyes is maximum at
  1.    White portion of spectrum
  2.    Green portion of spectrum
  3.    Red portion of spectrum
  4.    Violet portion of spectrum
 Discuss Question
Answer: Option B. -> Green portion of spectrum
Question 34. Which of the following could be the maximum current rating of junction diode by 126?
  1.    1 A
  2.    10 A
  3.    20 A
  4.    100 A
 Discuss Question
Answer: Option A. -> 1 A
Question 35. Piezoelectric quartz crystal resonators find application where
  1.    Signal amplification is required
  2.    Rectification of the signal is required
  3.    Signal frequency control is required
  4.    Modulation of signal is required
 Discuss Question
Answer: Option B. -> Rectification of the signal is required
Question 36. In the sale of diamonds the unit of weight is carat. One carat is equal to
  1.    100 mg
  2.    150 mg
  3.    200 mg
  4.    500 mg
 Discuss Question
Answer: Option C. -> 200 mg
Question 37. Forbidden energy gap in germanium at 0 K is about
  1.    10 eV
  2.    5 eV
  3.    2 eV
  4.    0.78 eV
 Discuss Question
Answer: Option D. -> 0.78 eV
Question 38. In a semiconductor diode, the barrier offers opposition to
  1.    Holes in P-region only
  2.    Free electrons in N-region only
  3.    Majority carriers in both regions
  4.    Majority as well as minority carriers in both regions
 Discuss Question
Answer: Option C. -> Majority carriers in both regions
Question 39. As compared to bipolar junction transistor, a FET
  1.    Is less noisy
  2.    Has better thermal stability
  3.    Has higher input resistance
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 40. Assertion (A): A VMOS can handle much larger current than other field effect transistors.Reason (R): In a VMOS the conducting channel is very narrow.
  1.    Both A and R are true and R is correct explanation of A
  2.    Both A and R are true but R is not a correct explanation of A
  3.    A is true but R is false
  4.    A is false but R is true
 Discuss Question
Answer: Option C. -> A is true but R is false

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