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The thermo e.m.f. E in volts of a certai...

The thermo e.m.f. E in volts of a certain thermocouple is found to vary with temperature difference q in `.^(@)C` between the two junctions according to the relation `E=30 theta-(theta^(2))/(15)`
The neutral temperature for the thermo-couple will be:-

A

`400^(@)C`

B

`225^ (@)C`

C

`30^(@)C`

D

`450^(@)C`

Text Solution

Verified by Experts

At neutral temperature `(dE)/(dtheta)=0`
so `30-(2thetan)/(15) =0rArrtheta_(n)=225^(@)C`
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