The table provides the thermo-emf sensitivity of five materials with reference to platinum around 273 k.

Material	Constantan	Nickel	Copper	Iron	Nichrome
Sensitivity (μv/K)	-35	-25	+6	+18.5	+25

Two copper constantan thermocouples are connected such that the two constantan wires are joined together. The two copper wires are connected to the input of a low noise chopper stabilized differential amplifier having a gain of 1000. One of the thermocouple junctions is immersed in a flask containing ice and water in equal proportion. The other thermocouple is at a temperature T. If the output of the amplifier is 2.050 V, the temperature T is