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Q.

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

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a

flow from antimony to Bismuth at the hot junction

b

flow from Bismuth to Antimony at the cold junction

c

not flow through the thermocouple

d

flow from Antimony to Bismuth at the cold junction

answer is D.

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Detailed Solution

We know that in thermo-electric series Bismuth comes earlier than Antimony. So, at cold junction the current will flow from Antimony to Bismuth.

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