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Which of the following is the best conductor of electricity?

  • A.Aluminium
  • B.Gold
  • C.Silver
  • D.Copper

Answer: C

Silver is the best conductor.

Its resistivity is \(1.59\times10^{-8}\ \Omega\,\mathrm{m}\), just below copper's. Copper is used for wiring nonetheless because silver is far more expensive and tarnishes in air.

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