In an unbalanced three phase system, phase current Ia = 1∠(-90°) pu – McqOptions

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1.	In an unbalanced three phase system, phase current Ia = 1∠(-90°) pu, negative sequence current Ib2 = 4 ∠(-150°) pu, zero sequence current IC0 = 3∠ 90° pu. The magnitude of phase current Ib in pu is
A.	1
B.	7.81
C.	11.53
D.	13
Answer» D. 13

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