JEE MAIN - Physics (2006 - No. 35)
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
flow from Antimony to Bismuth at the hot junction
flow from Bismuth to Antimony at the cold junction
now flow through the thermocouple
flow from Antimony to Bismuth at the cold junction
Forklaring
At cold junction, current flows from Antimony to Bismuth (because current flows from metal occurring later in the series to metal occurring earlier in the thermoelectric series).