Find the thermo-emf developed in a copper-silver thermocopule when the junctions are kept at `0^@ C` and `40^@ C`. Use the data in table.

Answer

A, D

Explanation

Thermal and chemical effected of electric current `
`E_(cs) = a_(cs) theta = (1)/(2) b_(cs) theta^2`
` `
`a_cs = [2.76 - (-43.7)muV`
`=46.46 muV //`
`^@C`
` `
`=b_(cs) = [0.012 -(-0.47) mu V //`
`^@C^2`
` Putting this value in the equation `
` E_(cs) = 46.46 xx10^(-6) xx 40 + (1)/(2)xx0.482 xx10^(-6)xx(40)^2`
`=1.04 xx10^(-5) V`