3.12 CELLS IN SERIES AND IN PARALLEL
Chapter 3: Chapter 3 · PHYSICS PART-1 · EN medium
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Like resistors, cells can be combined together in an electric circuit. And like resistors, one can, for calculating currents and voltages in a circuit, replace a combination of cells by an equivalent cell. FIGURE . Two cells of emf’s ε1 and ε2 in the series. r1, r2 are their internal resistances. For connections across A and C, the combination can be considered as one cell of emf εeq and an internal resistance req. Consider first two cells in series (Fig. . ), where one terminal of the two cells is joined together leaving the other terminal in either cell free. ε1, ε2 are the emf’s of the two cells and r1, r2 their internal resistances, respectively.
📖 NCERT Class 12 Physics Part 1 · Page 117
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Like resistors, cells can be combined together in an electric circuit. And like resistors, one can, for calculating currents and voltages in a circuit, replace a combination of cells by an equivalent cell. FIGURE . Two cells of emf’s ε1 and ε2 in the series.
r1, r2 are their internal resistances. For connections across A and C, the combination can be considered as one cell of emf εeq and an internal resistance req. Consider first two cells in series (Fig. .
), where one terminal of the two cells is joined together leaving the other terminal in either cell free. ε1, ε2 are the emf’s of the two cells and r1, r2 their internal resistances, respectively. Let V (A), V (B), V (C) be the potentials at points A, B and C shown in Fig. .
. Then V (A) – V (B) is the potential difference between the positive and negative terminals of the first cell. We have already calculated it in Eq. ( .
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