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

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