Electric Circuits
A delta connection contains three equal impedance of 60 Ω. The impedance of the equivalent star connection for each star load will be

 15 Ω.
 20 Ω.
 40 Ω.
 30 Ω.

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Electric Circuits
Pure metal generally have

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

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