Question

31. A resistance of 4 ohms and a wire of length 5 metres and
resistance 5 ohms are joined in series and connected
to a cell of e.m.f. 10 V and internal resistance 1 ohm.
A parallel combination of two identical cells is
balanced across 300 cm of the wire. The e.m.f. E
of each cell is​

Answer 1

Answer:

2.72 V the explanation is in the image