Electric Circuits
A balanced three Phase Y-connected load has one phase voltage VB = 277∠45o V. The phase sequence is RYB. The line to line voltage VRY is

 339∠45o V.
 339∠- 45o V.
 480∠ - 45o V.
 480∠45o V.

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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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