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
What is called the instantaneous value of an alternating current?

 The value of peak current at any instant.
 The value of alternating quantity at any instant.
 The value of alternating frequency at any instant.
 The value of peak quantity at any instant.

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