When cells are connected in parallel having EMF E1 E2 and so on but the resultant EMS is e so I want to ask why EMF is not additive in this case why in series combination EMF gets added
12 cells each having same e.m.f are connected in series and are kept in a closed box. Some of the cells are wrongly connected. This battery is connected in series with an ammeter and two cells identical with the others. The current is 3A when the cells and the battery support each other and 2A when the cells and the battery oppose each other. The number of cells in the battery that are wrongly connected is