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Question

Consider the following two statements.
(A) Free electron density is different metals.
(B) Free electron density in a metal depends on temperature.
Seebeck effect is caused

A
due to both A and B
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B
due to A but not due to B
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C
due to B but not due to A
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D
neither due to A nor due to B.
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Solution

The correct option is A due to both A and B
Seebeck effect occurs in thermocouple which is a combination of two different metals. Since, free electron density is different for different metals and free electron density in a metal depends on temperature.

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