Battery

In many devices, like transistor radios, you may see multiple electric cells connected together in a series circuit, as shown in Fig. a. Connecting cells in this way helps to increase the total potential difference (voltage), which allows the circuit to produce a stronger current. 

Series Connection:

In a series setup, the positive terminal of one cell is connected to the negative terminal of the next cell, as shown in Fig (b). This arrangement creates a continuous path for electric current, combining the voltage of each cell. By connecting cells in series, the total voltage increases, allowing devices to operate with more power. When multiple cells are connected in this way, they are called a battery of cells.

For example, if each cell provides 1V, connecting three cells in series results in a total potential difference of 3V (1V + 1V + 1V).

(a)

(b)

Connecting Cells