A) \[50\,\,mV\]
B) \[7.2\,\,mV\]
C) \[42.8\,\,mV\]
D) \[57.2\,\,mV\]
Correct Answer: D
Solution :
The sensitivity of the thermocouple will be \[=500\mu V{{/}^{o}}C-(-72\mu V{{/}^{o}}C)\]\[=572\mu \,V{{/}^{o}}C\] Therefore for a \[{{100}^{o}}C\] temperature difference, the thermo e.m.f. will be \[E=572\times {{10}^{-6}}\times 100\,(volt)\]\[=57.2\times {{10}^{-3}}\]\[=57.2\,\,mV.\]
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