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MCQs

Total Questions : 148 | Page 2 of 15 pages
Question 11. The output of the multiplier is fed to which of the following immediately?
  1.    Pulse amplifier discriminator
  2.    DAC
  3.    ADC
  4.    Multichannel analyser
 Discuss Question
Answer: Option A. -> Pulse amplifier discriminator
Answer: (a).Pulse amplifier discriminator
Question 12. Which of the following is the most commonly used magnetic shielding?
  1.    Helmholtz coils
  2.    Ferro-magnetic shielding
  3.    Faraday shield
  4.    Magnetometer probe
 Discuss Question
Answer: Option B. -> Ferro-magnetic shielding
Answer: (b).Ferro-magnetic shielding
Question 13. Synchroton radiation has several advantages over conventional radiation.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 14. Which of the following is the ideal vacuum for electron spectrometers?
  1.    10⁻⁶ torr
  2.    10⁻⁷ torr
  3.    10⁻⁸ torr
  4.    10⁻⁹ torr
 Discuss Question
Answer: Option A. -> 10⁻⁶ torr
Answer: (a).10⁻⁶ torr
Question 15. Charging effect can be suppressed by supplying flood of electrons having which of the following?
  1.    Uniform low energy
  2.    Uniform low mass
  3.    Uniform high energy
  4.    Uniform high mass
 Discuss Question
Answer: Option A. -> Uniform low energy
Answer: (a).Uniform low energy
Question 16. Which of the following is the x-y resolution of ISS?
  1.    1 µ
  2.    10 µ
  3.    100 µ
  4.    1000 µ
 Discuss Question
Answer: Option C. -> 100 µ
Answer: (c).100 µ
Question 17. Which of the following can be used as the detector in ion spectroscopy?
  1.    Faraday cup collector
  2.    Channel electron multiplier
  3.    Micro-channel plate
  4.    Flame ionization detector
 Discuss Question
Answer: Option B. -> Channel electron multiplier
Answer: (b).Channel electron multiplier
Question 18. Only those electrons which are in a selected small solid angle are received in the ________ electrostatic analyser.
  1.    100°
  2.    127°
  3.    180°
  4.    263°
 Discuss Question
Answer: Option B. -> 127°
Answer: (b).127°
Question 19. In ion spectroscopy, the positive ions are focussed on the sample at which of the following angles?
  1.    20°
  2.    30°
  3.    45°
  4.    90°
 Discuss Question
Answer: Option C. -> 45°
Answer: (c).45°
Question 20. Which of the following is the x-y resolution of SIMS?
  1.    1 µ
  2.    10 µ
  3.    100 µ
  4.    1000 µ
 Discuss Question
Answer: Option A. -> 1 µ
Answer: (a).1 µ

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