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MCQs

Total Questions : 120 | Page 11 of 12 pages
Question 101. Which of the following represents correct conversion for magnetostrictive transducers?
  1.    Mechanical energy to magnetic energy
  2.    Mechanical energy to electrical energy
  3.    Magnetic energy to electrical energy
  4.    Mechanical energy to acoustic energy
 Discuss Question
Answer: Option A. -> Mechanical energy to magnetic energy
Answer: (a).Mechanical energy to magnetic energy
Question 102. Which of the following element shows increase in magnetic flux density on decreasing stress applied?
  1.    Nickel Iron alloy
  2.    Nickel
  3.    Both Nickel and Nickel iron alloy
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> Nickel
Answer: (b).Nickel
Question 103. Which of the following materials shows an increase in permeability with increase in tensile stress?
  1.    Negative magnetostriction materials
  2.    Non magnetostriction materials
  3.    Positive magnetostriction materials
  4.    None of the mentioned
 Discuss Question
Answer: Option C. -> Positive magnetostriction materials
Answer: (c).Positive magnetostriction materials
Question 104. Which of the following represents negative magnetostriction?
  1.    On increasing stress permeability decreases
  2.    On decreasing stress permeability decreases
  3.    On increasing stress conductivity decreases
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> On increasing stress permeability decreases
Answer: (a).On increasing stress permeability decreases
Question 105. Magnetostrictive transducer can be used to measure _______________
  1.    Force
  2.    Acceleration
  3.    Torque
  4.    All of the mentioned
 Discuss Question
Answer: Option D. -> All of the mentioned
Answer: (d).All of the mentioned
Question 106. Which of the following materials can be used as photoconductive transducer?
  1.    Selenium
  2.    Silicon
  3.    Germanium
  4.    All of the mentioned
 Discuss Question
Answer: Option D. -> All of the mentioned
Answer: (d).All of the mentioned
Question 107. Semiconductor layer using silicon and germanium is known as _______________
  1.    Photo diodes
  2.    Photo junction diodes
  3.    Photo material
  4.    Photo sensitive materials
 Discuss Question
Answer: Option B. -> Photo junction diodes
Answer: (b).Photo junction diodes
Question 108. Which of the following are used to form photo transistors?
  1.    Two photo diodes
  2.    Three photo diodes
  3.    Normal diodes
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> Two photo diodes
Answer: (a).Two photo diodes
Question 109. Photo resistive cells are _____________
  1.    Active device
  2.    Passive device
  3.    Insulating device
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> Passive device
Answer: (b).Passive device
Question 110. Photo transistor is a three terminal device.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False

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