The thermo emf of a thermocouple varies with the temperature of the hot junction as in volt where the ratio is 700°C . If the cold junction is kept at 0°C, then the neutral temperature is
700°C
350°C
1400°C
no neutral temperature is possible for this thermocouple.
As we learnt in
E.m.f of cell -
The potential difference accross the terminals of a cell when it is not supplying any current is called e.m.f
-
At neutral temperature
Neutral temperature is calculated to be i.e. no neutral temperature possible this thermocouple.
Option 1)
700°C
This option is incorrect.
Option 2)
350°C
This option is incorrect.
Option 3)
1400°C
This option is incorrect.
Option 4)
no neutral temperature is possible for this thermocouple.
This option is correct.
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