Current Electricity Charging Discharging Of Capacitors Question 749
Question: For a thermocouple, the neutral temperature is $ 270{}^\circ C $ and the temperature of its cold junction is $ 20{}^\circ C $ . If there is no deflection in the galvanometer, the temperature of the hot junction should be
[AMU Engg. 2000]
Options:
A) $ 210{}^\circ C $
B) $ 540{}^\circ C $
C) $ 520{}^\circ C $
D) $ 209{}^\circ C $
Show Answer
Answer:
Correct Answer: C
Solution:
When there is no deflection, then this temperature is called inversion temperature. It is given by the relation $ {\theta _{n}}=\frac{{\theta _{i}}+{\theta _{c}}}{2} $ Where $ {\theta _{c}} $ is temperature of cold junction $ =20^{o}C $ and neutral temperature $ {\theta _{n}}=270^{o}C $
$ \
Therefore $ $ {\theta _{i}}=2{\theta _{n}}-{\theta _{c}}=540-20=520^{o}C $
BETA
