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Physics · Oct / Nov 2017 · Paper 12 · Question 17

5054Thermal expansion of solids, liquids and gases

A thermocouple is a type of thermometer. Which statement applies to a thermocouple?

  1. AIt can measure rapidly varying temperatures.
  2. BIt must be made from three different metals.
  3. CIts resistance decreases when one junction is heated.
  4. DThe distance between the two junctions increases as the temperature increases.

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Correct answer: A. It can measure rapidly varying temperatures.

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