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what is resistance?
Resistance is a measure of the tendency of a material to resist the flow of an electrical current. It is dependent on the nature of the material, its thickness and length, and on temperature. Resistance is low in substances, such as metals, that are good conductors, and high in materials, such as plastic and rubber, that are insulators. When an electrical current encounters resistance, part of its energy is converted into heat, and sometimes light, reducing the current.


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