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Thermodynamic Processes

Which of the ...

Question

Which of the following is/are wrong
a) Seebeck effect is irreversible
b) Thomson effect is localized at the junction
c) Joule heating effect is independent of the direction of flow of current in a conductor

A

a and b are wrong

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B

a and c are wrong

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C

b and c are wrong

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D

all are wrong

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Solution

The correct option is A a and b are wrong
In seebeck effect, temperature difference across a conductor produces potential difference while in petlier effect, potential difference across conductor causes temperature difference. Since the two process are opposite phenomenon, seebeck effect is reversible.

Since Joule heating is $H = I^{2} R$ , direction of current is irrelevant.
Hence statement a is incorrect and c is correct.

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