Transformers The no load ratio of a 50 Hz single phase transformer is 6000/250 V. The maximum flux in the core is 0.06 Wb. What is the number of primary turns? 350 210 900 450 350 210 900 450 ANSWER DOWNLOAD EXAMIANS APP
Transformers Natural air cooling is generally restricted for transformers up to 1.5 MVA 50 MVA 5 MVA 15 MVA 1.5 MVA 50 MVA 5 MVA 15 MVA ANSWER DOWNLOAD EXAMIANS APP
Transformers If a transformer core has air gaps, then, _________ Magnetising current is greatly increased Hysteresis loss is decreased Reluctance of magnetic path is decreased Eddy current is increased Magnetising current is greatly increased Hysteresis loss is decreased Reluctance of magnetic path is decreased Eddy current is increased ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer transfers electrical energy from primary to secondary usually with a change in ______ Power Voltage Time period Frequency Power Voltage Time period Frequency ANSWER DOWNLOAD EXAMIANS APP
Transformers The secondary of a current transformer is always short-circuited under operating conditions because it protects the primary circuit is safe to human beings None of these avoids core saturation and high voltage induction protects the primary circuit is safe to human beings None of these avoids core saturation and high voltage induction ANSWER DOWNLOAD EXAMIANS APP
Transformers The open circuit test on a transformer gives _______ Total losses Copper losses Iron losses Friction losses Total losses Copper losses Iron losses Friction losses ANSWER DOWNLOAD EXAMIANS APP
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