Question

Assertion (A): In the thermoelectric series Cu appears earlier than Fe.
Reason (R): At cold junction of Cu - Fe thermocouple thermo electric current flows from Fe to Cu.

• A. Both A and R are true and R is correct explanation of A
• B. Both A and R are true and R is not correct explanation of A
• C. A is true R is false
• D. A is false R is true

Answer 1

The correct option is D A is false R is true

Seebeck Series: Seebeck arranged the metals in a series based on their behavior and is known as the Seebeck series or thermoelectric series.

Since the thermoelectric current flows from a metal earlier in the series to a metal later in the series, thermo electric current flows from Fe to Cu at the cold junction of the thermo-couple. hence reason is correct.

Assertion A is incorrect:

Fe(Iron) appears as the third element in the series and Cu does not appear earlier to Fe in the thermoelectric series.