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If RR^‘, YY^‘ and BB^‘ constitutes three phase sequence if V^‘RR = Vmsinωt its corresponding field magnets are in clockwise direction, then the value of V^‘BB is?

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If RR^‘, YY^‘ and BB^‘ constitutes three phase sequence if V^‘RR = Vmsinωt its corresponding field magnets are in clockwise direction, then the value of V^‘BB is?

(a) Vmsin(ωt-240⁰)

(b) Vmsin(ωt-120⁰)

(c) Vmsin(ωt+240⁰)

(d) Vmsinωt

I got this question during an online exam.

I would like to ask this question from Polyphase System in division Polyphase Circuits of Network Theory

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Correct choice is (a) Vmsin(ωt-240⁰)

Best explanation: The value of V^‘BB is V^‘BB = Vmsin(ωt-240⁰). There are only two possible phase sequences; they are RBY and RYB.

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