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In a delta connected system, the voltage across the terminals R and Y is 400∠0⁰. Find the line voltage VBR. (a) 400∠240⁰ (b) 400∠120⁰ (c) 400∠-240⁰ (d) 400∠-120⁰ I got this question in an international level competition. This interesting question is from Voltage, Current and Power in a Delta Connected System in chapter Polyphase Circuits of Network Theory Select the correct answer from above options network theory questions and answers, network theory questions pdf, network theory question bank, network theory gate questions and answers pdf, mcq on network theory pdf, gate network theory questions and solutions, network theory mcq Test , ies network theory questions, Network theory Questions for GATE EC Exam, Network Theory MCQ (Multiple Choice Questions)

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Right choice is (c) 400∠-240⁰ Easiest explanation: We know, |VBR| = |VPh|, and is displaced by 120⁰, therefore the line voltage VBR is VBR = 400∠-240⁰V. Delta connection is so called because the three branches in the circuit can be arranged in the shape of delta.

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