Chapter-3|Current Electricity| NCERT 12th Physics:
Combinations of Cells
Two Cells in Series:
When two cells are connected in series, then total EMF of cells Eeq= E₁+E₂ and total internal resistance req= r₁+r₂
If Cells Are Connected – to – And + to + Terminal in Series:
Two Cells in Parallel:
When two cells are connected in parallel, then we connect – to – and + to + terminals.