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A thermocouple having a linear relationship between 0$^{o}$C and 350$^{o}$C shows an emf of zero and 30.5 mV, respectively at these two temperatures. If the cold junction temperature is shifted from 0$^{o}$C to 30$^{o}$C, then the emf correction (in mV) is

  1. 3.13
  2. 2.92
  3. 2.61
  4. 2.02
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