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MCQs

Total Questions : 166 | Page 5 of 17 pages
Question 41. Is a negatively charged particle present in an atom.
  1.    Proton
  2.    Neutron
  3.    Electron
  4.    None of the above
 Discuss Question
Answer: Option C. -> Electron
Question 42. The resistivity of a metal is a function of temperature because
  1.    The amplitude of vibration of the atoms varies with temperature
  2.    The electron density varies with temperature
  3.    The electron gas density varies with temperature
  4.    None of the above
 Discuss Question
Answer: Option A. -> The amplitude of vibration of the atoms varies with temperature
Question 43. Selenium is _____ semiconductor.
  1.    Extrnisic
  2.    Intmisic
  3.    N-type
  4.    P-type
 Discuss Question
Answer: Option B. -> Intmisic
Question 44. _______ is a hard solder.
  1.    Tin-lead
  2.    Tin-silver-lead
  3.    Copper-zinc
  4.    None of the above
 Discuss Question
Answer: Option C. -> Copper-zinc
Question 45. The structure sensitive property of a super conductor is
  1.    Critical magnetic field
  2.    Transition temperature
  3.    Critical current density
  4.    None of the above
 Discuss Question
Answer: Option C. -> Critical current density
Question 46. Spark plug makes use of which of the following materials for insulation ?
  1.    Porcelain
  2.    Slate
  3.    Asbestos
  4.    Glass
 Discuss Question
Answer: Option A. -> Porcelain
Question 47. An H.R.C. fuse is
  1.    A ceramic body having metal and caps
  2.    A wire of platinum
  3.    A heavy cross-section of copper or aluminium
  4.    A ceramic tube having carbon rod inside it
 Discuss Question
Answer: Option A. -> A ceramic body having metal and caps
Question 48. Which of the following materials is used for making coils of standard resistances ?
  1.    Copper
  2.    Nichrome
  3.    Platinum
  4.    Manganin
 Discuss Question
Answer: Option D. -> Manganin
Question 49. The minority carrier concentration is largely a function of
  1.    Forward biasing voltage
  2.    Reverse biasing voltage
  3.    Temperature
  4.    The amount of doping
 Discuss Question
Answer: Option C. -> Temperature
Question 50. High resistivity materials are used in
  1.    Precision instruments
  2.    Heating elements
  3.    Motor starters
  4.    Incandescent lamps
  5.    All of the above
 Discuss Question
Answer: Option E. -> All of the above

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