Transformers Efficiency of a power transformer is of the order of 25 per cent 50 per cent 100 per cent 98 per cent 25 per cent 50 per cent 100 per cent 98 per cent ANSWER DOWNLOAD EXAMIANS APP
Transformers The eddy current loss in a transformer is directly proportional to _______. The flux density in the core Thickness of core lamination Square of thickness of core lamination The supply frequency The flux density in the core Thickness of core lamination Square of thickness of core lamination The supply frequency ANSWER DOWNLOAD EXAMIANS APP
Transformers An ideal transformer is one which _______ Has same number of primary and secondary turns Has no losses and leakage reactance Does not work None of the listed here Has same number of primary and secondary turns Has no losses and leakage reactance Does not work None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding, what is the reflective resistance if the secondary load resistance is 250 ? 62500 Ω 25 Ω 250 Ω 6250 Ω 62500 Ω 25 Ω 250 Ω 6250 Ω ANSWER DOWNLOAD EXAMIANS APP
Transformers When a 6 V battery is connected across the primary of a transformer with a turns ratio of 8, the secondary voltage is 48 V 0 V 0.75 V 6 V 48 V 0 V 0.75 V 6 V ANSWER DOWNLOAD EXAMIANS APP
Transformers The primary and secondary of a transformer are ______ coupled. Electrically and magnetically Magnetically None of the listed here Electrically Electrically and magnetically Magnetically None of the listed here Electrically ANSWER DOWNLOAD EXAMIANS APP
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