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   ocr: What IS an electric current? Electricity is a form of energy. It has many uses because it: is easily changed into other forms of energy. Electricity is also very useful because itcan flow along wires to wherever we need it. We call this flow an electric current and it is measured in units called ampères or amps (A). Almost everywhere, cuirent electricity drives the things that we do. Bulbs change electricity into light, electric heaters change electricity into heat, and electric motors change electricity into motion. Most electric currents consist of astream of particles called electrons, but ...