Two cells of emf E₁ and E₂ and internal resistances r₁ and r₂ respectively, are connected in parallel, with their terminals of the same polarity connected together. Obtain an expression for the equivalent emf of the combination.

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TextCells in Parallel CombinationCBSE PYQ

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(i) A cell emf of (E) and internal resistance (r) is connected across a variable load resistance (R). (i) R and (ii) the current (I) in the load. Draw plots showing the variation of terminal voltage V with (i) R and (ii) the current (I) in the load. (ii) Three cells, in which each of emf E but internal resistances 2r, 3r and 6r are connected in parallel across a resistor R. Obtain expressions for (i) current flowing in the circuit, and (ii) the terminal potential difference across the equivalent cell.

CASE_STUDIESRelation Between EMF, Terminal Voltage and Internal ResistanceCells in Parallel Combination

Two identical cells, each of emf E and internal resistance r, are connected with a load resistance R, first in series and then in parallel. Obtain the condition under which the current through R is same in both cases.

TextCells in Series CombinationCells in Parallel Combination