The thermo emf of a thermocouple varies with temperature θ of the hot junction as E = aθ + b θ ² in volts where the ratio a/b is 700° C. If the cold junction is kept at 0° C, then the neutral temperature is

(D) No neutral temperature is possible for this termocouple.

Current Electricity: JEE Main 2004 Physics question

JEE Main 2004 · Annual, Paper 1 · Q6410

JEE Main 2004Annual, Paper 1PhysicsEasyCurrent Electricity150× since 2002

The thermo

emf

of a thermocouple varies with temperature

\theta

of the hot junction as

E = a\theta + b{\theta ^2}

in volts where the ratio

a/b

{700^ \circ }C.

If the cold junction is kept at

{0^ \circ }C,

then the neutral temperature is