Electric Circuits
If the three colour bands of a resistor are grey, violet and gold, what is the value of the resistor?

 6.7 ohms.
 8.7 ohms.
 9.7 ohms.
 7.7 ohms.

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Electric Circuits
Pure metal generally have

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

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