The cold junction of a thermocouple is a...

The cold junction of a thermocouple is at `0^(@)C`. The thermo e.m.f. `epsilon`, in volts, generated in this thermocouple varies with temperature `t^(@)C` of the hot junction as `epsilon=6+4t-(t^(2))/(32)`. The neutral temperature of the thermocouple

`100^(@)C`

`76 ^ (@)C`

`64^(@)C`

`50^(@)C`

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