N sources of current with different emf's are connected as shown in Fig. 3.40. The emf's of the sources are proportional to their internal resistances, i.e. emf(ℰ) = αR, where α is an assigned constant. The lead wire resistance is negligible. Find:
(a) the current in the circuit;
(b) the potential difference between points A and B dividing the circuit in n and N — n links.
