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MCQs

Total Questions : 146 | Page 5 of 15 pages
Question 41. Light produced in a screen is _______
  1.    disappears immediately
  2.    does not disappear at all
  3.    is not visible to the eye
  4.    disappears slowly
 Discuss Question
Answer: Option D. -> disappears slowly
Answer: (d).disappears slowly
Question 42. Role of an attenuator is ___________
  1.    to boost the signal
  2.    to distort the signal
  3.    to remove noise
  4.    to improve the operation
 Discuss Question
Answer: Option D. -> to improve the operation
Answer: (d).to improve the operation
Question 43. Amplifier stage is ___________
  1.    half band
  2.    full band
  3.    wide band
  4.    narrow band
 Discuss Question
Answer: Option C. -> wide band
Answer: (c).wide band
Question 44. What is the role of CRT?
  1.    to emit electrons
  2.    to emit protons
  3.    to emit neutrons
  4.    to emit alpha particles
 Discuss Question
Answer: Option A. -> to emit electrons
Answer: (a).to emit electrons
Question 45. Input signals are amplified using ___________
  1.    rectifier
  2.    amplifier
  3.    oscillator
  4.    op amp
 Discuss Question
Answer: Option B. -> amplifier
Answer: (b).amplifier
Question 46. What is the role of the focus section in a CRO?
  1.    increases the focus
  2.    decreases the focus
  3.    controls sharpness
  4.    maintains the focus zero
 Discuss Question
Answer: Option C. -> controls sharpness
Answer: (c).controls sharpness
Question 47. What is the role of scale illumination in a CRO?
  1.    measurement
  2.    illumination
  3.    sharpness
  4.    stability
 Discuss Question
Answer: Option A. -> measurement
Answer: (a).measurement
Question 48. What is the role of an invert in a CRO?
  1.    inverts the output
  2.    inverts the input
  3.    attenuates the input
  4.    magnifies the input
 Discuss Question
Answer: Option B. -> inverts the input
Answer: (b).inverts the input
Question 49. What is the role of astigmatism in a CRO?
  1.    increases the intensity
  2.    used for voltage stability
  3.    diminishes the intensity
  4.    focus control
 Discuss Question
Answer: Option D. -> focus control
Answer: (d).focus control
Question 50. X10 in a CRO means ________
  1.    one tenth
  2.    control knob
  3.    10 times as normal
  4.    attenuate the voltage by 10 times
 Discuss Question
Answer: Option C. -> 10 times as normal
Answer: (c).10 times as normal

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