copper–constantan thermocouple is to be used to measure temperatures
between 0 and 200°C. The e.m.f. at 0°C is 0 mV, at 100°C it is 4.277 mV and
at 200°C it is 9.286 mV. What will be the non-linearity error at 100°C as a
percentage of the full range output if a linear relationship is assumed between
e.m.f. and temperature over the full range
