A) \[20{}^\circ C\]
B) \[320{}^\circ C\]
C)
\[-20{}^\circ C\] D)
\[40{}^\circ C\]
Correct Answer:
C Solution :
\[{{t}_{n}}-{{t}_{0}}={{t}_{i}}-{{t}_{n}}\] \[\Rightarrow \] \[{{t}_{0}}=2{{t}_{n}}-{{t}_{i}}\] Given, \[{{t}_{i}}={{620}^{o}}C,\,\,{{t}_{n}}={{300}^{o}}C\] Hence, \[{{t}_{0}}=\] temperature of cold junction \[=2\times 300-620\] \[=600-620=-20{}^\circ C\] Note: Neutral temperature does not change for a metal whether the temperature of cold junction and inversion temperature change by any value.
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