Ohms law - a law stating that electric current is proportional to voltage and inversely proportional to resistance.

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Conductor - a material or device that conducts or transmits heat, electricity, or sound, especially when regarded in terms of its capacity to do this.

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Friction - the resistance that one surface or object encounters when moving over another.

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Electric Current - An electric current is a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space.

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Electromagnet - a soft metal core made into a magnet by the passage of electric current through a coil surrounding it.

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