Two wire of 5 mm in dia are soldered two ends to form a thermo-couple. The thermocouple was initially at 28C, it was suddenly dipped in a bath of 500C. Find out the Biot number if the thermal conductivity of the material is 350 w/m^2.k and convective heat transfer coefficient between wire and fluid is 80 w/ m^2.k.

5. Two wires of 5mm in dia are soldered two ends to form a thermo-couple. The thermocouple was initially at 28C, it was suddenly dipped in a bath of 500OC. Find out the Biot number if the thermal conductivity of the material is 350w/m.k and convective heat transfer coefficient between wire and fluid is 80w/m2k