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MCQs

Total Questions : 80 | Page 5 of 8 pages
Question 41. A Multimeter is used to measure ___________
  1.    Only AC current
  2.    Only DC voltage
  3.    Both AC and DC quantities
  4.    Resistance only
 Discuss Question
Answer: Option C. -> Both AC and DC quantities
Answer: (c).Both AC and DC quantities
Question 42. Which of the following applications are electrostatic instruments suited for?
  1.    With AC quantities only
  2.    With AC and DC quantities
  3.    With DC quantities only
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> With AC and DC quantities
Answer: (b).With AC and DC quantities
Question 43. Which of the following unit is used to express the sensitivity of analog voltmeter?
  1.    Ohms
  2.    Voltage
  3.    No unit
  4.    Ohms per volt
 Discuss Question
Answer: Option D. -> Ohms per volt
Answer: (d).Ohms per volt
Question 44. Which of the following device can be used to measure low voltage?
  1.    VTVM
  2.    Moving iron voltmeter
  3.    CRO
  4.    None of the mentioned
 Discuss Question
Answer: Option C. -> CRO
Answer: (c).CRO
Question 45. In a CRO what is the purpose of the blanking circuit?
  1.    To increase visual quality
  2.    To increase number of channels
  3.    To eliminate retrace of signals due to movement of spot
  4.    None of the mentioned
 Discuss Question
Answer: Option C. -> To eliminate retrace of signals due to movement of spot
Answer: (c).To eliminate retrace of signals due to movement of spot
Question 46. Who invented the first digital voltmeter?
  1.    Edward Lawry Norton
  2.    Andrew Kay
  3.    Joseph Henry
  4.    Nicola tesla
 Discuss Question
Answer: Option B. -> Andrew Kay
Answer: (b).Andrew Kay
Question 47. Which of the following can be the range of input impedance of voltmeter?
  1.    less than 1Ω
  2.    Between 1Ω and 10Ω
  3.    Very high
  4.    unpredictable
 Discuss Question
Answer: Option C. -> Very high
Answer: (c).Very high
Question 48. What will be the sensitivity of a volt meter with 0 to 7mA meter movement?
  1.    143 Ω/ V
  2.    140 Ω/V
  3.    100 Ω/V
  4.    10 Ω/V
 Discuss Question
Answer: Option A. -> 143 Ω/ V
Answer: (a).143 Ω/ V
Question 49. In a CRO to which part saw tooth waveform is applied?
  1.    Horizontal amplifier
  2.    To fluorescent screen
  3.    Vertical deflection plate
  4.    Electron gun
 Discuss Question
Answer: Option A. -> Horizontal amplifier
Answer: (a).Horizontal amplifier
Question 50. What is the purpose of a differential amplifier in voltmeter?
  1.    Elimination of unwanted signals
  2.    To find difference of voltages
  3.    To eliminate DC components
  4.    To set a certain voltage level
 Discuss Question
Answer: Option A. -> Elimination of unwanted signals
Answer: (a).Elimination of unwanted signals

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