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Electricity makes our lives easier by powering our lights, refrigerators, and even some cars! Electricity can travel around in systems called circuits, which carry current—a stream of flowing electrons.Batteries are a form of stored electricity and can have different voltages, or levels of electric force. Research the types of batteries you will use in this experiment online to find out their voltages. Batteries provide direct current (DC) to a circuit, which means the direction of the current is always the same. Electrical outlets in our home provide alternating current (AC), which is more efficient at carrying electricity.Circuits, which often use batteries and wires to power useful devices like light bulbs, carry current when they are in a closed circuit, which means that electricity can travel in a loop. Resistance, which is a property of a material, can be found in the batteries, wires, lights, and other devices and is what causes energy to be used up in a system

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Fecha publicación: 12.5.2016

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