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Glossary of Terms

Volt
A measurement of the force of an electrical current. Voltage comes from the activity of free electrons moving between atoms, or the movement that fundamentally creates electric power. Power plants send high-voltage currents through a transformer so the electricity can be sent down transmission lines to reach substations, where another transformer turns the current into low-voltage levels appropriate for consumers. High-voltage currents travel more efficiently over long distances (however, due to the resistance of the wire, energy is lost during transfer). Voltage is different than current, which describes how fast electricity can travel through a certain substance, like a transmission line. Electric current is measured in amps.
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