R

Ram Sharma • 193.88K Points
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Q. Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (l/20th of ordinary metals)?

  • (A) Alumel
  • (B) Chromel
  • (C) Constantan
  • (D) Invar
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