Thermocouples are used to measure temperature in the linear parts of the emf versus temperature graph with cold junction at $$0^o C$$ . The thermo-electric power of Pt, Ni thermocouple are -4 and -20 microvolt per $$^oC$$ respectively. What will be the magnitude of emfs of the thermocouple when the cold junction is at $$0^oC$$ and the hot junction is at $$100^oC$$?