If for a thermocouple is the neutral temperature, is the temperature of the cold junction and is the temperature of inversion, then :
None of the above
For a thermocouple, the temperature of inversion is that temperature at which thermo e.m.f. is :
Zero
Maximum
Minimum
None of the above
For a given thermocouple, the thermo e.m.f. can be :
Zero
Positive
Negative
All of the above
When current is passed in antimony-bismuth couple, then :
The junction becomes hot when the current is from bismuth to antimony
The junction becomes hot when current flows from antimony to bismuth
Both junctions become hot
Both junctions become cold
For a given temperature difference, which of the following pairs will generate maximum thermo e.m.f?
Antimony-bismuth
Silver-gold
Iron-copper
Lead-nickel
Which of the following is not reversible?
Joule effect
Peltier effect
Seebeck effect
Thomson effect
As the temperature of hot junction of a thermo couple is increased (while cold junction is at constant temperature), the thermo e.m.f. :
Increases uniformly at constant rate
Increases slowly in the beginning and more rapidly at higher temperatures
Increases more rapidly in the beginning but less rapidly at higher temperatures
In minimum at neutral temperature
The temperature of cold junction and neutral temperature of a thermocouple are and respectively. The temperature of inversion is :
Consider the following two statements A and B, and identify the correct choice out of given answers :
A.Thermo e.m.f. is minimum at neutral temperature of a thermocouple
B.When two junctions made of two different metallic wires are maintained at different temperatures, an electric current is generated in the circuit.
A is false and B is true
A is true and B is false
Both A and B are false
Both A and B are true
The temperature at which thermal electric power of a thermo couple becomes zero is called :
Inversion temperature
Neutral temperature
Junction temperature
Null temperature