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Grade 12Electric Current

A number of identical cells, n, each of emf E, internal resistance r connected in series are Charged by a d.c. source of emf E¢, using a resistor R.
(i) Draw the circuit arrangement.
(ii) Deduce the expressions for (a) the charging current and (b) the potential difference across the combination of the cells.

Profile image of Baljeet Singh
8 Years agoGrade 12
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1 Answer

Profile image of Arun
8 Years ago
Resistance in the circuit R , emf of each cell is e and internal resistance is r, connected in series and total number of cell is n and the DC source emf  is E.
So the resistance of the circuit =nr+R and emf =ne+E
(i)Therefore current through the circuit to charge the cells is , I  = (E - ne)/(nr + R)
(ii) Potential difference across the combination of cells = ne

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