Q. The junction of Ni-Cu thermo couple are maintained at$\ 0℃\ and\ 100℃$. The seeback emf developed in the temperature is ${{\ a}_{Ni}}_{- Cu} = 16.3 \times 10^{- 6}V℃^{- 1}$ ${{\ b}_{Ni}}_{- Cu} = - 0.021 \times 10^{- 6}V℃^{- 1}$
A) $2.73 \times 10^{3}$V
B) $1.42 \times 10^{- 3}$V
C) $3.68 \times 10^{- 3}$V
D) $2.23 \times 10^{3}$V
Explanation
(b) ${E_{Ni}}_{- Cu} = at + bt^{2}$
$= \left( 16.3 \times 10^{- 6} \right)(100) + \left( - 0.021 \times 10^{- 6} \right) \times (100)^{2}$
$= 1.42 \times 10^{- 3}$V
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.