b) ohm's law

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4 Terms

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  • define Ohm’s law

  • for a metal conductor at a constant temperature

  • the potential difference across the ends of a wire is directly proportional to the current in it

2
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  • describe how high temperatures within a wire increase the resistance

  • higher kinetic energy of positive ions in the wire

  • higher magnitude of their vibrations

  • more frequent collisions with electrons

  • more work done by electrons to travel through the wire

  • higher resistance

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