Here's why:
* Voltage is a measure of electrical potential difference. It represents the "push" that drives electrons through a circuit.
* Cells and batteries have a specific voltage rating. A standard AA battery has a voltage of 1.5V, for example.
* Series connection means connecting the positive terminal of one cell/battery to the negative terminal of the next. This creates a continuous path where the voltage "stacks up".
Therefore, if you connect two 1.5V batteries in series, the total voltage will be 3V. Three batteries would give you 4.5V, and so on.
Important note: This only applies to series connections. Connecting cells/batteries in parallel will keep the voltage the same but increase the current capacity.
