Question

When the power factor is __________ the power becomes zero 100 times a second in a 50Hz supply. (a) 0 (b) 1 (c) 2 (d) 3 I had been asked this question during a job interview. My query is from Polyphase System in section 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

Right option is (b) 1 The explanation: The power in a single phase circuit is pulsating. When the power factor is one, the power becomes zero 100 times a second in a 50Hz supply. Therefore single phase motors have a pulsating torque.