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MCQs

Total Questions : 66 | Page 7 of 7 pages
Question 61. A _____ cooling rate solidifies metallic glass made from iron- base alloys.
  1.    10°C s⁻¹
  2.    100°C s⁻¹
  3.    1000°C s⁻¹
  4.    10000°C s⁻¹
 Discuss Question
Answer: Option D. -> 10000°C s⁻¹
Answer: (d).10000°C s⁻¹
Question 62. An electrically insulating material has a resistivity that is ____ times greater than that of copper.
  1.    10¹⁸
  2.    10¹⁹
  3.    10²⁰
  4.    10²¹
 Discuss Question
Answer: Option D. -> 10²¹
Answer: (d).10²¹
Question 63. The measure of loss of energy in a material is defined as _____
  1.    Resistivity
  2.    Dissipation factor
  3.    Electric strength
  4.    Conductivity
 Discuss Question
Answer: Option B. -> Dissipation factor
Answer: (b).Dissipation factor
Question 64. Cork has a low thermal conductivity of _____ W/m K.
  1.    0.01
  2.    0.04
  3.    0.07
  4.    0.1
 Discuss Question
Answer: Option C. -> 0.07
Answer: (c).0.07
Question 65. The resistance of an insulating material ______ as the temperature increases.
  1.    Increases
  2.    Decreases
  3.    Remains the same
  4.    Becomes infinitely large
 Discuss Question
Answer: Option B. -> Decreases
Answer: (b).Decreases
Question 66. Ionic conductivity of a material can be increased by _______
  1.    Absorption of water
  2.    Increase in temperature
  3.    Increase in length
  4.    Decrease in temperature
 Discuss Question
Answer: Option A. -> Absorption of water
Answer: (a).Absorption of water

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