Q. The Petlier coefficient of a thermo-couple of metls $A\ $and $B$ at junction temperature $T$ is given by
A) $T^{2}\frac{dE}{dT^{2}}$
B) $T\frac{dE}{dT}$
C) $T^{3}\frac{dE^{2}}{dT}$
D) $T^{4}\frac{d^{2}E}{dT^{2}}$
Explanation
(b) $\pi = T\ dE/dT$.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.