A Leclanche cell with thc e.m.f. 1.45 V and internal resistance 2 N is connected to a potentiometer wire through a resistance 1440 N in serics. The potentiometer wire has length potential gradient along the potentiomcter wire. What the balancing length of this potentiometer wire in case of thermocouple 4 m and resistance 8 . Find the will be with e.m.f. 100 uV ?
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