In a balanced three-phase system-delta load, if we assume the line voltage is VRY = V∠0⁰ as a reference phasor. Then the source voltage VYB is?
(a) V∠0⁰
(b) V∠-120⁰
(c) V∠120⁰
(d) V∠240⁰
I had been asked this question in semester exam.
My enquiry is from Three-Phase Balanced Circuits in portion Polyphase Circuits of Network Theory