Voltage is a measure of electrical potential difference. It shows the level of electrical energy in a system. Voltage is found in batteries, power supplies, and electrical systems. It is measured in units called volts.

Voltage is used in homes, machines, and devices around the world. It is present in all electrical systems. Different systems use different voltage levels depending on their design.

Voltage is part of how electricity is described and measured. It is used to compare energy levels in circuits. This measurement is important in electrical systems.