☰ Electrical Engineering Material (Electrical Engineering) - MCQs

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Q49.

the temperature coefficient of resistance of an insulator is

  • A. positive and independent of temperature
  • B. negative and independent of temperature
  • C. negative and dependent on temperature
  • D. positive and dependent on temperature
    ✍ Discuss    
Q50.

which of the following materials has the highest dielectric strength?

  • A. polystyrene
  • B. marbel
  • C. cotton
  • D. transformer oil
    ✍ Discuss    
Q51.

exposure of insulating material to moisture cause increase in

  • A. dielectric loss
  • B. dielectric constant
  • C. dielectric strength
  • D. insulation resistance
    ✍ Discuss    
Q52.

the undesirable property of an electrical insulating material is

  • A. high dielectric strength
  • B. high relative permittivity
  • C. high thermal conductivity
  • D. high insulating resistivity
    ✍ Discuss    
Q53.

the material which obstructs the flow of current without any applicable laws of power is called the ________ material

  • A. dielectric
  • B. insulating
  • C. antiferromagnetic
  • D. superconducting
    ✍ Discuss    
Q54.

the following material is not used for making a piezoelectric transducer

  • A. rochelle salt
  • B. barium titanate
  • C. chlorium sulphide
  • D. quartz
    ✍ Discuss    
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