1. Four chromel-alumel thermocouples are connected in series. The four junctions are at 100, 150, 200, and 250?C. The series arrangement is hooked to a potentiometer, the copper-binding posts of which are at 30?C. What voltage will be indicated by the potentiometer?
2. What could be the thermoelectric sensitivity of a nichrome-aluminum combination? Of a nichrome-constantan combination?