Question:
As the temperature of hot junction increases, the thermo emf
As the temperature of hot junction increases, the thermo emf
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In many materials, as the temperature of the hot junction increases, the thermo emf decreases.
Updated On: Apr 22, 2026
- always increases
- always decreases
- may increase or decrease
- always remains constant
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The Correct Option is B
Solution and Explanation
Step 1: Understanding thermo emf.
Thermo emf is the voltage generated across the junctions of two dissimilar conductors due to the difference in temperature, as described by the Seebeck effect.
Step 2: Analyzing the relationship between temperature and thermo emf.
- In most materials, as the temperature of the hot junction increases, the thermo emf decreases. This happens because the material properties that contribute to the thermo emf often become less effective at higher temperatures.
Step 3: Conclusion.
Therefore, the correct answer is (2) because the thermo emf typically decreases as the temperature increases.
Thermo emf is the voltage generated across the junctions of two dissimilar conductors due to the difference in temperature, as described by the Seebeck effect.
Step 2: Analyzing the relationship between temperature and thermo emf.
- In most materials, as the temperature of the hot junction increases, the thermo emf decreases. This happens because the material properties that contribute to the thermo emf often become less effective at higher temperatures.
Step 3: Conclusion.
Therefore, the correct answer is (2) because the thermo emf typically decreases as the temperature increases.
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