Question

23. Two cells, one of e.m.f. 1.2 V and internal resistance 0.5 ohm, the other of e.m.f. 2 V and internal
resistance 0.1 ohm are connected in parallel and the combination connected in series with an external resistance
of 5 ohm. What is the current through this resistance?
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Answer 1

Answer:

The emf and internal resistance of the equivalent cell are 1.7 V and 0.12 ohms. Hence, The emf and internal resistance of the equivalent cell are 1.7 V and 0.12 ohm.