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Ezio3.1415
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Why the thermoelectric emf doesn't depend on the lower temperature of the thermocouples... And why does the emf start to decrease after a certain increase of temperature?
Ezio3.1415 said:say cold part is 0 degree c then the emf is highest for a certain T in the hot part... If its cold part is 5,the T for highest emf remains same... Doesn't this mean the emf is independent of the cold parts temperature?
Thermoelectric EMF (electromotive force) is the voltage generated when there is a temperature difference between two different conductors.
Thermoelectric EMF can be measured using a thermocouple, which consists of two different metals joined together at two points. The voltage generated between these points is proportional to the temperature difference.
The relationship between temperature and thermoelectric EMF is linear. This means that as the temperature difference between the two conductors increases, the voltage generated also increases.
Thermoelectric EMF has various applications, such as temperature measurement, power generation, and refrigeration. It is commonly used in industries where precise temperature control is necessary, such as in the production of semiconductors.
The voltage generated by thermoelectric EMF is dependent on the temperature difference between the two conductors. As the temperature difference changes, the voltage generated also changes. This means that the thermoelectric EMF is not constant and can be affected by changes in temperature.