The thermo e.m.f of a thermo-couple is given by , $\xi =a T +bT^2,$ where $a/b=-200^{\circ}C$. If the cold function is kept at $30^{\circ}$, then the inversion temperature is ($ \xi$ in volts, T is in centigrade): - Clay6.com, a Free resource for your JEE, AIPMT and Board Exam preparation

The thermo e.m.f of a thermo-couple is given by , $\xi =a T +bT^2,$ where $a/b=-200^{\circ}C$. If the cold function is kept at $30^{\circ}$, then the inversion temperature is ($ \xi$ in volts, T is in centigrade):