Question

The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10∠-90⁰Ω are delta-connected to a 400V, 3 – Ø system. Find the power in the B phase. (a) 0 (b) 1 (c) 3 (d) 2 I got this question in examination. The question is from Three-Phase Unbalanced Circuits topic in division 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)

Answer 1

Correct answer is (a) 0 Easy explanation: The term power is defined as the product of square of current and the impedance. So the power in the B phase = 40^2 x 0 = 0W.