What happens when two or more batteries are connected in series?

When two or more batteries are connected in series, their voltages add together. This means if you connect multiple batteries in series, the total voltage output of the combination is the sum of the voltages of the individual batteries. For instance, if you connect two batteries that each provide 1.5 volts, the total voltage would be 3 volts. This principle is essential in understanding how series circuits function, as it allows for higher voltage output which can power devices requiring more voltage than a single battery can provide.

In contrast, while the capacities of the batteries refer to how long they can supply power before needing a recharge, this does not add in series; it remains equal to the capacity of the battery with the smallest capacity in the series. Also, when connected in series, the current does not equalize but rather remains constant throughout the circuit. Lastly, resistance does not decrease when batteries are added in series; instead, the overall resistance of the circuit increases.