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

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

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Electric Circuits
What is called a cycle in case of AC operation ?

 When an alternating quantity completes the (–)ve cycle, is called a cycle.
 Option A and C both.
 When ac completes the (+)ve half, is called a cycle.
  When ac goes through a complete (+)ve to (-)ve, is called a cycle.

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