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MCQs

Total Questions : 146 | Page 4 of 15 pages
Question 31. What determines light intensity in a CRT?
  1.    voltage
  2.    current
  3.    momentum of electrons
  4.    fluorescent screen
 Discuss Question
Answer: Option C. -> momentum of electrons
Answer: (c).momentum of electrons
Question 32. Electron beam diverges.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 33. Deflection system of a CRT consists of ________
  1.    4 plates
  2.    6 plates
  3.    2 plates
  4.    8 plates
 Discuss Question
Answer: Option C. -> 2 plates
Answer: (c).2 plates
Question 34. Effect of negative voltage to the grid is ________
  1.    no force
  2.    a gravitational force
  3.    an attractive force
  4.    a repulsive force
 Discuss Question
Answer: Option D. -> a repulsive force
Answer: (d).a repulsive force
Question 35. Focusing and accelerating anodes are ________
  1.    rectangular
  2.    cylindrical
  3.    spherical
  4.    square
 Discuss Question
Answer: Option B. -> cylindrical
Answer: (b).cylindrical
Question 36. A single cycle appears on the screen when _______
  1.    sweep and signal frequencies are equal
  2.    sweep and signal frequencies are not equal
  3.    sweep and signal frequencies are zero
  4.    sweep frequency is greater than signal frequency
 Discuss Question
Answer: Option A. -> sweep and signal frequencies are equal
Answer: (a).sweep and signal frequencies are equal
Question 37. What is done to make the trace horizontal?
  1.    negative voltage is applied
  2.    positive voltage is applied
  3.    no voltage is applied
  4.    voltage is synchronised
 Discuss Question
Answer: Option D. -> voltage is synchronised
Answer: (d).voltage is synchronised
Question 38. During trace time, voltage is decreasing with time.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 39. Sinusoidal voltage is not observed on the screen.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 40. What is the flyback period?
  1.    voltage is very high
  2.    current is very low
  3.    voltage is zero
  4.    current is very high
 Discuss Question
Answer: Option C. -> voltage is zero
Answer: (c).voltage is zero

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