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Which of the following processes is not an application of thermoelectric effect?

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Which of the following processes is not an application of thermoelectric effect?

(a) Seebeck effect

(b) Peltier effect

(c) Thomson effect

(d) Ettingshausen effect

I have been asked this question in unit test.

This interesting question is from Electrical Properties in division Properties of Engineering Materials of Engineering Material & Metallurgy

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Correct choice is (d) Ettingshausen effect

The best I can explain: Seebeck, Peltier, and Thomson are three distinct effects which make up the thermoelectric effect. Ettingshausen effect, however, is a separate thermoelectric phenomenon like the Nernst effect.

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