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A thermocouple is made from two metals, Antimony and Bismuth. If one junction of the couple is kept hot and the other is kept cold, then an electric current will:

  1. A
    flow from Antimony to Bismuth at the cold junction
  2. B
    flow from Antimony to Bismuth at the hot junction
  3. C
    flow from Bismuth to Antimony at the cold junction
  4. D
    not flow through the thermocouple

Solution & Step-by-step Explanation

In an Antimony () and Bismuth () thermocouple, according to the ABC rule (Antimony-Bismuth-Cold), the current flows from Antimony to Bismuth at the cold junction.

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Try it yourself before checking the explanation above.

A thermocouple is made from two metals, Antimony and Bismuth. If one junction of the couple is kept hot and the other is kept cold, then an electric current will:
A
flow from Antimony to Bismuth at the cold junction
B
flow from Antimony to Bismuth at the hot junction
C
flow from Bismuth to Antimony at the cold junction
D
not flow through the thermocouple

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Thermal PropertiesThermocouples

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