Question

Why do batteries have a potential difference or voltage? *

there is an imbalance of electrons at each terminal of the battery

the number of electrons at each terminal of the battery is the same

there is an imbalance of neutrons at each terminal of the battery

the number of neutrons at each terminal of the battery is the same

Answer 1

Basically it all comes down to potential energy. A battery supplies electrical potential energy that can enable electrical current to flow. ... When the battery is connected to a closed circuit, current will flow. The current will encounter electrical resistance causing voltage to drop (a loss in potential energy).