Question

Q3. Describe the formula for the equivalent EMF and internal resistance for the parallel combination of
two cells with emf's E1 and E2 and internal resistance ri and r2 respectively. What is the corresponding
formula for the series combination? Two cells of emf 1V, 2V and internal resistance 20 and 10
respectively are connected in (i) series, () parallel. What should be the external resistance in the circuit
so that the current through the resistance be the same in the two cases? in which case more heat is
generated in the cells?​

Answer 1

Answer:

For the two cells connected in series the voltage developed is V = (ε1 + ε2) – I (r1+r2). V = εeq - req if we replace the number of cells by a single cell.

Explanation:

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