engineering recuitment GATE IN Test Series 2023-24 Mock Test Sensors and Industrial Instrumentation Measurement of Temperature
The below table provides the thermos-emf sensitivity of five materials with reference to platinum around 273 K.
|
Material |
Constantan |
Nickel |
Copper |
Iron |
Nichrome |
|
Sensitivity (μVK-1) |
-35 |
-25 |
+6 |
+18.5 |
+25 |
Which one of the following thermocouple pairs has maximum sensitivity around 273 K?
1
Nichrome-constantan
2
Copper-Nickel
3
Platinum-constantan
4
Nickel-constantan