Electric Circuits
If C be the capacitance, V be the potential difference and I be the current, then I / CV will have the unit of

 reactive power.
 frequency.
 power.
 time.

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Electric Circuits
Pure metal generally have

  low conductivity and high temperature coefficient.
  high conductivity and low temperature coefficient.
  high conductivity and large temperature coefficient.
  low conductivity and zero temperature coefficient.

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