Near room t emperature, the thermo emf of a copper constantan couple
Channel: Doubtnut
Date: 02/02/2020

Near room t emperature, the thermo emf of a copper constantan couple is `40 muV` per degree. What is the smallest temperature difference that can be detected with a single such couple and a galvanometer of 100 ohm resistance capable of detecting current as low `10^(-6)` ampere?