Electric Current Test

Result

Electric Current Test - 7

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Question 1
1 / -0

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

Solution

In thermocouple at cold junction, current flows from Antimony to Bismuth because current flows from the metal having high thermoelectric voltage to the metal having low thermoelectric voltage.

The thermoelectric voltage of Antimony is +4.8 mV

the Thermoelectric voltage of Bismuth is -7.70 mV.