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The cold junction of a thermocouple is k...

The cold junction of a thermocouple is kept at `10^(@)`C. Calculate the temperature at which thermo emf would be maximum. Given that thermo emf changes sign at 800K.

Text Solution

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The correct Answer is:
Potential difference that can be detected `=IgR_(g)=1 mu Axx80Omega`
`80 xx 10^(-6)V`
Thermo emf`=40 muV=40 xx 10^(-6)V`
If `theta` is the deflection in the galvanometer , then
`50xx10^(-6)xx theta=50xx10^(-6) " or "theta=2^(@)C`.
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