Video Transcript
The diagram shows four identical
cells connected in series. What is the total emf provided by
the cells?
In this question, we are shown four
identical cells connected in series. We know that when components are
connected in series, there is only one path that an electric current can take
through the components. The cells are connected in series,
so the single path that current can take must pass through all of the cells. This means that the potential
difference between the ends of the path must be increased by each cell on the
path.
Looking at our circuit diagram, we
have four identical cells, where each cell produces an emf of six volts. We can calculate the total emf
produced by summing the emfs of each of the cells, which equals 24 volts. So the total emf produced by four
six-volt cells connected in series is 24 volts.
