Question

My text book says that some electrical devices using batteries have cells placed horizontally together, while other electrical devices have cells placed vertically together using connecting wires. Why is the positioning of cells in the batteries of different electronic devices vary?

Answer 1

when cells are placed horizontally together, they are connected in parallel, which delivers same potential but increases the current.
When cells are placed vertically together, they are connected in series, which delivers same current but increased potential.