Answer Posted / prajapatsuraj306@gmail.com

Single phase differences are two phases 90 ' and Three phase differences are 120' and Three phase , Three wire ( R, Y, B,)
= sin 120+ sin120+ sin120
= 2.59
and Three phase Power
= 1.732 V I cos Q
= v I and cosQ is imagine part because they are value depand on circuit
= 2.59*1.732
= 450 volt

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