A thermoelectric thermometer is made . of copper-iron thermocouple. One junction is placed in melting ice and the other end is placed in a bath, whose temperature is continuously increased from 0°C to 600°C. The current in the galvanometer :

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remains constant

constantly goes on increasing

first increases and then decreases to zero

first increases, becomes maximum and then decreases to zero and finally reverse its direction

answer is D.

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Detailed Solution

Thermo electromotive force first increases, becomes maximum and then decreases to zero and finally reverse its direction if temperature is continuously increased from 0oC to 600oC.

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