Transformers Which of the following property is not necessarily desirable in the material for transformer core? High thermal conductivity Mechanical strength High permeability Low hysteresis loss High thermal conductivity Mechanical strength High permeability Low hysteresis loss ANSWER DOWNLOAD EXAMIANS APP
Transformers A certain transformer has a turns ratio of 1 and a 0.85 coefficient of coupling. When 2 V ac is applied to the primary, the secondary voltage is 1 V 0.85 V 0 V 1.7 V 1 V 0.85 V 0 V 1.7 V ANSWER DOWNLOAD EXAMIANS APP
Transformers The maximum flux produced in the core of a transformer is ______ None of the listed here Inversely proportional to primary voltage Inversely proportional to supply frequency Directly proportional to supply frequency None of the listed here Inversely proportional to primary voltage Inversely proportional to supply frequency Directly proportional to supply frequency ANSWER DOWNLOAD EXAMIANS APP
Transformers In which of the following transformer part of primary winding also serves as the secondary winding? Potential transformer Current transformer Auto transformer Step-up transformer Potential transformer Current transformer Auto transformer Step-up transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer has a 1:6 turns ratio and a secondary coil load resistance of 470 . The load resistance as seen by the source is 78 Ω 7.8 Ω 13 Ω 1.3 Ω 78 Ω 7.8 Ω 13 Ω 1.3 Ω ANSWER DOWNLOAD EXAMIANS APP
Transformers The core type transformer provides _______ Lesser average length per turn None of the listed here Much longer magnetic path Shorter magnetic path Lesser average length per turn None of the listed here Much longer magnetic path Shorter magnetic path ANSWER DOWNLOAD EXAMIANS APP
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