Transformers If a power transformer is operated at very high frequencies, then ______ Primary will draw large power Primary reactance is too much increased Core losses will be excessive None of the listed here Primary will draw large power Primary reactance is too much increased Core losses will be excessive None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers The power efficiency of a lightning transformer is always ______its all day efficiency. Higher than None of the listed here Equal to Less than Higher than None of the listed here Equal to Less than ANSWER DOWNLOAD EXAMIANS APP
Transformers If 25 W of power are applied to the primary of an ideal transformer with a turns ratio of 10, the power delivered to the secondary load is 250 W 0 W 2.5 W 25 W 250 W 0 W 2.5 W 25 W ANSWER DOWNLOAD EXAMIANS APP
Transformers The approximate efficiency of a large transformer is 80% 95% 50% 65% 80% 95% 50% 65% ANSWER DOWNLOAD EXAMIANS APP
Transformers The secondary of a current transformer is always short-circuited under operating conditions because it None of these is safe to human beings protects the primary circuit avoids core saturation and high voltage induction None of these is safe to human beings protects the primary circuit avoids core saturation and high voltage induction ANSWER DOWNLOAD EXAMIANS APP
Transformers What kVA rating is required for a transformer that must handle a maximum load current of 8 A with a secondary voltage of 2 kV? 0.25 kVA 16 kVA 4 kVA 8 kVA 0.25 kVA 16 kVA 4 kVA 8 kVA ANSWER DOWNLOAD EXAMIANS APP
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