Identify that resistance in metals is increased by the presence of impurities and scattering of electrons by lattice vibrations

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Identify that resistance in metals is increased by the presence of impurities and scattering of electrons by lattice vibrations

  • Chemical impurities disrupt the integrity of a metal lattice and impede electron flow.
  • Rapid minor position changes, or vibrations, in a metal lattice impede electron flow.
  • Vibrations cause a lattice to collide with free-moving electrons, deflecting or scattering them from their linear progress through the crystal.
  • The degree of vibration of a lattice is directly related to its temperature, with higher temperatures increasing resistance by causing greater vibration.