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MCQs

Total Questions : 148 | Page 10 of 15 pages
Question 91. Which of the following is used as detector crystal in ESR spectrometer?
  1.    Silicon rectifier
  2.    Silicon tungsten rectifier
  3.    Silicon boron rectifier
  4.    Silicon quartz rectifier
 Discuss Question
Answer: Option B. -> Silicon tungsten rectifier
Answer: (b).Silicon tungsten rectifier
Question 92. The output of the klystron does not pass through which of the following?
  1.    Isolator
  2.    Reflector
  3.    Power leveller
  4.    Directional coupler
 Discuss Question
Answer: Option B. -> Reflector
Answer: (b).Reflector
Question 93. After detection, the resulting signal will have which of the following frequencies?
  1.    1 kHz
  2.    10 kHz
  3.    100 kHz
  4.    1000 kHz
 Discuss Question
Answer: Option C. -> 100 kHz
Answer: (c).100 kHz
Question 94. Which of the following is the modulation amplitude range of ESR spectrometer?
  1.    1mG to 10G
  2.    2mG to 15G
  3.    3mG to 20G
  4.    5mG to 40G
 Discuss Question
Answer: Option D. -> 5mG to 40G
Answer: (d).5mG to 40G
Question 95. In which of the following ranges will the receiver time constant of the ESR spectrometer lie?
  1.    0 to 10 s
  2.    0.3 to 1 s
  3.    0.03 to 10 s
  4.    0.003 to 100 s
 Discuss Question
Answer: Option D. -> 0.003 to 100 s
Answer: (d).0.003 to 100 s
Question 96. Which of the following is the oscilloscope field width of the ESR spectrometer?
  1.    0.2 to 40 G
  2.    0.1 to 20 G
  3.    0 to 10 G
  4.    0.01 to 20 G
 Discuss Question
Answer: Option A. -> 0.2 to 40 G
Answer: (a).0.2 to 40 G
Question 97. Which of the following sensor is used in ESR spectrometer?
  1.    Hall-effect sensor
  2.    Load cell
  3.    Strain gauge
  4.    Bourdon gauge
 Discuss Question
Answer: Option A. -> Hall-effect sensor
Answer: (a).Hall-effect sensor
Question 98. Which of the following oscillator is used as 1230 Hz oscillator?
  1.    Hartley oscillator
  2.    Crystal oscillator
  3.    RC oscillator
  4.    Wien bridge oscillator
 Discuss Question
Answer: Option D. -> Wien bridge oscillator
Answer: (d).Wien bridge oscillator
Question 99. What does AFC stand for?
  1.    Auto frequency correct
  2.    Automated frequency correct
  3.    Automatic frequency control
  4.    Automatic frequency circuit
 Discuss Question
Answer: Option C. -> Automatic frequency control
Answer: (c).Automatic frequency control
Question 100. The magnet used in ESR spectrometer provides a magnetic field which can be varied from ________ to _______
  1.    20 mgauss, 100mgauss
  2.    200 mgauss, 20kgauss
  3.    20 mgauss, 20kgauss
  4.    100 mgauss, 10kgauss
 Discuss Question
Answer: Option B. -> 200 mgauss, 20kgauss
Answer: (b).200 mgauss, 20kgauss

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