1. A thermopile is to be constructed for measuring small temperature differences. Devise arrangements to measure temperature differences of 1, 3, and 5?C using copper-constantan and chromel-constantan thermocouples. Discuss the uncertainties which may be encountered.
2. Two platinum resistance thermometers are used to measure a temperature difference of 8?C. Discuss the uncertainties which may be involved. Would a thermopile arrangement be better and, if so, why?