Electric Circuits
What is time period T?

 Time taken by an alternating quantity to complete the (-)ve half.
 Time taken by an alternating quantity to complete the (+)ve half.
 Time taken by an alternating quantity to complete one full cycle.
 Time taken by an alternating quantity to reach the peak value.

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Electric Circuits
Pure metal generally have

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

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