A strain gauge having an unstrained resistance of 120 and a gauge factor of 2.1 is bonded onto a steel girder so that it

A strain gauge having an unstrained resistance of 120 Ù and a gauge factor of 2.1 is bonded onto a steel girder so that it experiences a tensile stress of 108 Pa. If Young’s modulus for steel is 2 × 1011 Pa, calculate the strained resistance of the gauge.

Table Prob. 22 gives values for the e.m.f. of a Type T thermocouple relative to a reference junction temperature of 0 °C. Use the table to calculate:

(a) the percentage non-linearity at 150 °C if the temperature range is 0 to 300 °C;

(b) the temperature inside a vessel if an e.m.f. of 11.5 mV is measured relative to a reference junction