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When is the series combination of cells advantageous and why? |
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Answer» Solution :Series combination is advantageous when high e.m.f (terminal POTENTIAL difference at low current is required. In series combination of cells, `i= (n epsi)/(nr+R)` where `r LT lt R `, then `I = (n epsi)/(R)` `THEREFORE ir = n epsi` `therefore` Potential difference ACROSS the external resistance is n times e.m.f of each CELL. |
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