Category: Electrical Machines

Potential Transformer MCQ Questions with Answers

A Potential transformer or PT is a type of special-purpose transformer that is designed to sample high voltage and provide a low secondary voltage that is directly proportional to it. Given below are most important basic MCQs on Potential transformers. Secondary winding rating of Potential Transformer Usually, Potential transformers have a secondary winding rating of: […]

Current Transformer MCQ Questions with Answers

A current transformer is a type of instrumentation transformer that steps down current in power systems to safe levels that can be processed via relays and measurement devices/equipment. Current transformers can be found in generation stations and switching stations. Given below are the most important Current Transformer MCQ Questions Secondary winding rating of Current Transformer […]

The voltage regulation of synchronous generator operating at a lagging power factor is

The voltage regulation of synchronous generator operating at a lagging power factor is: Negative Zero Positive None of these Correct answer: 3. Positive The synchronous generator operating at the lagging power factor has large positive voltage regulation. Voltage regulation is mathematically defined as: VR = (Vnl – Vfl)/ Vfl For lagging power factor the no-load voltage […]