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MCQs

Total Questions : 146 | Page 13 of 15 pages
Question 121. CRO can’t display microseconds 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 122. CRT is the heart of CRO.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 123. Typically oscilloscope represents __________
  1.    current and time
  2.    resistance and time
  3.    voltage and time
  4.    power and time
 Discuss Question
Answer: Option C. -> voltage and time
Answer: (c).voltage and time
Question 124. Electron gun section ________
  1.    provides sharp beam
  2.    provides poorly focussed beam
  3.    doesn’t provide any beam
  4.    provides electrons only
 Discuss Question
Answer: Option A. -> provides sharp beam
Answer: (a).provides sharp beam
Question 125. Control grid is given ________
  1.    positive voltage
  2.    negative voltage
  3.    neutral voltage
  4.    zero voltage
 Discuss Question
Answer: Option B. -> negative voltage
Answer: (b).negative voltage
Question 126. How is the waveform adjusted?
  1.    by adjusting the voltage
  2.    through shift controls
  3.    by reducing the current
  4.    by means of a galvanometer
 Discuss Question
Answer: Option B. -> through shift controls
Answer: (b).through shift controls
Question 127. Peak to peak voltage is given by ________
  1.    Vₚ₋ₚ = number of units × \((\frac{1}{division})\)
  2.    Vₚ₋ₚ = \((\frac{volts}{division})\)
  3.    Vₚ₋ₚ = number of units × volts
  4.    Vₚ₋ₚ = number of units × \((\frac{volts}{division})\)
 Discuss Question
Answer: Option D. -> Vₚ₋ₚ = number of units × \((\frac{volts}{division})\)
Answer: (d).Vₚ₋ₚ = number of units × \((\frac{volts}{division})\)
Question 128. The R.M.S voltage is given by which of the following relation?
  1.    Vᵣₘₛ = \(\frac{V_m}{2}\)
  2.    Vᵣₘₛ = \(\frac{V_m}{\sqrt{2}}\)
  3.    Vᵣₘₛ = \(\frac{V_m}{8}\)
  4.    Vᵣₘₛ = \(\frac{V_m}{\sqrt{8}}\)
 Discuss Question
Answer: Option B. -> Vᵣₘₛ = \(\frac{V_m}{\sqrt{2}}\)
Answer: (b).Vᵣₘₛ = \(\frac{V_m}{\sqrt{2}}\)
Question 129. The amplitude of voltage is given by which of the following relation?
  1.    Vₘ = \(\frac{V_{p-p}}{2}\)
  2.    Vₘ = \(\frac{V_{p-p}}{4}\)
  3.    Vₘ = 2 × Vₚ₋ₚ
  4.    Vₘ = 4 × Vₚ₋ₚ
 Discuss Question
Answer: Option A. -> Vₘ = \(\frac{V_{p-p}}{2}\)
Answer: (a).Vₘ = \(\frac{V_{p-p}}{2}\)
Question 130. How is error in measurement reduced?
  1.    using r.m.s value
  2.    using absolute value
  3.    using peak to peak value
  4.    using a voltmeter
 Discuss Question
Answer: Option C. -> using peak to peak value
Answer: (c).using peak to peak value

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